English words: megacomplex to megamodel

300 English words, part 51 of 159 of the words starting with M, A to Z. 14 have a page of their own.

English words megacomplex to megamodel

megacomplex adjective, noun: A very large complex of buildings
megaconference noun: A very large-scale conference.
megaconglomerate noun: A major business conglomerate.
megaconstellation noun: A very large asterism
megaconstruction noun: A very large construction.
megacool adjective: Very cool (trendy, fashionable, pleasing, etc.)
megacorp noun: A very large corporation; megacorporation.
megacorporate adjective: Relating to a megacorporation.
megacorporation noun: A corporation or business entity of immense size and influence.
megacorpse noun: One million corpses, as a unit of measure in reference to nuclear warfare.
megacosm noun: A macrocosm.
megacoulomb noun: A unit equal to a million coulombs.
megacryometeor noun: a very large water ice object that falls from the sky, similar in composition to hailstones
megacryst noun: Any crystalline grain in an igneous or metamorphic rock that is much larger than those of the surrounding matrix
megacult noun: A very large cult.
megacurie noun: The unit of radioactivity equal to one million curies
megacycle noun: Synonym of megahertz.
megacyclite noun: A monoclinic-prismatic mineral containing hydrogen, oxygen, potassium, silicon, and sodium.
megacyclothem noun: A collection of related cyclothems
megacyst noun: An enlarged urinary bladder
megacystis noun: A rare disease that is identified by an abnormally large or distended bladder.
megadairy noun: A large commercial dairy.
megadalton noun: A unit equal to one million daltons.
megadaraf noun: A unit of quantity of electric charge equal to one million darafs.
megadarra noun: Alternative form of mujaddara.
megadata noun: Extremely large collections of electronically-stored data.
megadeal noun: A transaction of very large size.
megadealer noun: A major, large-scale dealer.
megadeath noun /ˈmɛɡədɛθ/: One million deaths, especially as a unit of measure for estimating deaths due to nuclear warfare.
megadebt noun: An enormous debt
megadecibel noun: A measure of sound intensity, one million decibels.
megadeformed adjective: Greatly deformed
megadeletion noun: The deletion of many genes
megademo noun: A large, long-running demo (audiovisual presentation), sometimes one that multiloads.
megaderm noun: Any of several species of Old World blood-sucking bats of the genus Megaderma; the false vampire bat.
megadermatid noun: Any bat in the family Megadermatidae.
megadestruction noun: Very large-scale destruction, especially resulting from nuclear warfare.
megadeveloper noun: A very large developer.
megadevelopment noun: A very large real estate development.
megadisaster noun: An unexpected natural or man-made catastrophe of exceptional magnitude, causing unusually severe or unprecedented damage.
megadiverse adjective /ˌmɛɡədaɪˈvɜːs/: Exhibiting great diversity, especially great biodiversity.
megadiversity noun: Very great diversity.
megadolichocolon noun: An excessively long, dilated colon
megadollar adjective, noun: Of a million dollars or more.
megadomain noun: A large domain on certain chromosomes
megadome noun: A large dome-shaped building used for concerts, sports etc
megadonor noun: Someone who donates a lot, or who is responsible for a large amount of donations flowing to a person or entity.
megadont adjective: Having large teeth
megadontia noun: Malformation of megalodontia
megadontism noun: Synonym of macrodontia (“condition of having unusually large teeth”).
megadonty noun: Synonym of macrodontia (“condition of having unusually large teeth”).
megadosage noun: An extremely large dosage.
megadose noun, verb /ˈmɛɡəˌdəʊs/: A dose of drug or vitamin far exceeding the normal or recommended amount, and usually given intentionally. Compare overdose.
megadrile noun: A terrestrial oligochaete (worm of the superorder Megadrilacea in class Oligochaeta)
megadrought noun: A drought lasting for decades or centuries.
megadude noun: A man who is very cool, stylish, etc.
megaduke noun: The commander-in-chief of the Byzantine navy.
megadumb adjective: Extremely stupid.
megadump noun: A very large dump, or site for discarding waste.
megaduodenum noun: Abnormally large size of the duodenum.
megadyne noun: A unit of force equal to one million dynes
megaearthquake noun: An earthquake of very large magnitude.
megaelectron volt noun: One million electron volts, abbreviated as MeV.
megaelectronvolt noun: Alternative spelling of megaelectron volt.
megaenzyme noun: A very large enzyme
Megaera proper noun /məˈd͡ʒɪəɹə/: One of the Furies, Erinyes in Greek mythology, the cause of jealousy and envy, who punishes people who commit crimes, especially marital infidelity.
megaerg noun: Alternative form of megalerg.
megaesophagus noun: A condition where peristalsis fails to occur properly and the esophagus is enlarged.
megaevent noun: A very large-scale event.
megaevolution noun: Very large-scale evolution
megafab noun: A very large-scale manufacturing plant, especially one producing silicon chips.
megafactory noun: A very large manufacturing facility.
megafamous adjective: Very famous.
megafan noun: A very large mass of clastic sediment deposited by a laterally mobile river system that fans out from the outlet from a large mountainous drainage network.
megafarad noun: A unit of quantity of electric charge; the quantity of electricity flowing through a one megohm resistor when driven by an electromotive force of one volt...
megafarm noun: A very large, factory-style farm.
megafauna noun: The large animals of a given region or time, considered as a group.
megafaunal adjective: Of or pertaining to megafauna.
megafelid noun: big cat
megafestival noun: A very large-scale festival.
megafight noun: A major fight with heavy promotion (in boxing, wrestling, etc.).
megafinance noun: High finance: finance involving very large scales and sums of money
megafire noun: A very large wildfire, typically one covering more than 100,000 acres.
megafirm noun: A very large firm.
megafish noun: Any fish belonging to the megafauna.
megaflare noun: A very large solar flare
megaflood noun: A sudden discharge of an exceptionally large volume of water
megaflop noun: megaflops (one million FLOPS, or floating point operations per second)
megaflops noun: a measure of the speed of a computer; one million floating point operations per second.
megaflora noun: Any exceptionally large plant.
megafloral adjective: Of or pertaining to megaflora.
megafoot noun: A unit of length equal to one million feet.
megaforce noun: A great or united force.
megaform noun: A series of buildings linked by a physical framework
megafortune noun: A fortune of an amount in the millions.
megafossil noun: A relatively large fossil showing the structure of an organism.
megafragment noun: A very large fragment.
megafraud noun: Extremely large-scale fraud.
megafrugivore noun: A relatively large frugivore
megafrustule noun: A relatively large frustule
megafund noun: A major money-management operation dealing with large amounts of money.
megagallery noun: A very large commercial art gallery that operates globally.
megagallon noun: A unit of volume equal to one million gallons.
megagame noun: A very large, or highly successful, game.
megagamete noun: A macrogamete.
megagametocyte noun: Synonym of macrogametocyte.
megagametogenesis noun: The development of a megaspore into an embryo sac.
megagametophyte noun /ˌmɛɡəɡəˈmiːtə(ʊ)faɪt/: Any gametophyte that develops from a megaspore.
megagametophytic adjective: Relating to megagametophytes
megagauss noun: A unit equal to one million gauss.
megagenome noun: A very large genome
megagenomic adjective: Relating to megagenomes or to megagenomics
megagenomics noun: The study of megagenomes
megageomorphological adjective: Relating to megageomorphology.
megageomorphology adjective: Large-scale geomorphology.
megagift noun: A donation to charity of millions of dollars.
megagnathia noun: macrognathia
megagnathous adjective: Having a large jaw
megagon noun: A polygon with one million sides.
megagram noun: An SI unit of mass equal to 10⁶ grams. Symbol: Mg
megagramme noun: Alternative spelling of megagram.
megagroup noun: A particularly large group, bigger than a supergroup.
megagrowth noun: Extraordinary growth, especially in finance or industry.
megahabitat noun: A very large habitat, typically in the deep sea
megahack noun: A writer who is very much a hack.
megahash noun: A million hashes.
megahenry noun: An SI unit of electrical inductance equal to 10⁶ henrys. Symbol: M
megaherb noun: Any relatively large herb (plant).
megaherbivore noun: Any very large herbivore, typically one weighing more than 1000 kg
megaherbivorous adjective: relating to a megaherbivore
megahero noun: A very great hero.
megahertz noun: A unit equal to one million cycles per second.
megahex noun /ˈmɛɡəhɛks/: A regular, quasi-circular polygon made up of multiple hexagons used to indicate a different scale, range, or area of effect on a hexagonal grid. Commonly...
megahistorical adjective: Of or relating to megahistory.
megahistory noun: An extreme form of macrohistory, dealing with particularly large cultures over very long periods of time.
megahit noun /ˈmɛɡəhɪt/: A large success or hit.
megahome noun: A very large and luxurious home.
megahospital noun: A very large hospital
megahotel noun: A very large and luxurious hotel.
megahurt noun: megahertz.
megahype noun: Extreme hype.
megaichnofauna noun: Relatively large ichnofauna
megaindustrial adjective: Pertaining to a megaindustry.
megaindustry noun: A large-scale industry.
megainfluencer noun: An Internet celebrity with a very large following on a social media platform (especially someone with more than 1 million followers).
megaintestine noun: An abnormal dilation of the intestine
megaisochore noun: A large macroisochore
megajail noun: Synonym of megaprison.
megajerk noun: A particularly objectionable jerk.
megajoule noun: An SI unit of energy equal to 10⁶ joules. Symbol: MJ
megajournal noun: An online academic journal that focuses on publishing articles in large quantities and reduces the role of peer review in article acceptance.
megakalsilite noun: A hexagonal-pyramidal colorless mineral containing aluminum, oxygen, potassium, and silicon.
megakaryoblast noun: A precursor cell in hematopoiesis which gives rise to the promegakaryocyte, which in turn gives rise to the megakaryocyte.
megakaryoblastic adjective: Of or pertaining to a megakaryoblast
megakaryoblastoid adjective: Alternative form of megakaryoblastic.
megakaryocyte noun: A large cell, found in bone marrow, responsible for the production of platelets.
megakaryocytic adjective: Of, pertaining to, or containing megakaryocytes
megakaryocytopoiesis noun: The cellular development process that leads to platelet production.
megakaryocytopoietic adjective: Relating to megakaryocytopoiesis.
megakaryocytosis noun: cytosis involving megakaryocytes
megakaryogenesis noun: The formation and development of megakaryocytes
megakaryopoiesis noun: The production of megakaryocytes.
megakaryopoietic adjective: Relating to megakaryopoiesis
megakaryothrombopoiesis noun: The process of megakaryocyte development that leads to platelet production.
megakike noun: One million Jews.
megal- prefix: Alternative form of megalo-.
megaladapid noun: Any extinct lemur in the family Megaladapidae.
megalaesthete noun: A relatively large photoreceptor in the megalopore of a chiton
megalake noun: A very large lake, especially a prehistoric one
megaleak noun: A very large-scale or significant leak of information.
megalencephalic adjective: macrencephalic; having a large brain
megalencephaly noun: Synonym of macrencephaly.
megalerg noun: A unit of one million ergs.
Megalesian adjective /ˌmɛɡəˈliːʒən/: Pertaining to, or in honour of, Cybele.
megalethoscope noun: An optical apparatus in which pictures are viewed through a large lens with stereoptical effects.
megalichthyid noun: Any extinct fish in the family Megalichthyidae.
megalichthyiform noun: Any extinct fish of the order Megalichthyiformes
megalight-year noun: A unit of a million lightyears.
megalightyear noun: Alternative form of megalight-year.
megalin noun: A particular low-density transmembrane lipoprotein
megalineation noun: A very large lineation (typically as a result of glaciation)
megaliter noun: Alternative spelling of megalitre One million liters.
megalith noun /ˈmɛɡəlɪθ/: A large stone slab making up a prehistoric monument, or part of such a monument.
megalithic adjective /ˌmɛɡəˈlɪθɪk/: Of or pertaining to megaliths, to the people who made them, or to the period when they were made.
megalithically adverb: In a megalithic manner.
megalithism noun: The culture surrounding the building of megaliths.
megalitre noun: A unit of volume equivalent to 1,000,000 litres. Symbol: ML or Ml.
megalo- prefix /mɛˈɡæ.ləʊ/: large, great or exaggerated
megaloblast noun: An abnormally large red blood cell associated with pernicious anemia and with folic acid deficiency.
megaloblastic adjective: Pertaining to, or produced by a megaloblast
megaloblastoid adjective: Relating to, or characterised by megaloblasts.
megaloblastosis noun: The medical condition of having megaloblasts
megalocardia noun: The condition of having an enlarged heart.
megalocephalia noun: Synonym of macrencephaly
megalocephalic adjective: macrencephalic
megalocephalous adjective: macrencephalic
megalocephaly noun: Synonym of macrencephaly
megalocornea noun: A condition characterized by a very large cornea
megalocorneal adjective: Relating to megalocornea.
megalocyte noun: A large, flattened corpuscle, twice the diameter of the ordinary red corpuscle, found in considerable numbers in the blood in profound anemia.
megalocytivirus noun: Any of the genus Megalocytivirus of viruses in the family Iridoviridae, infecting teleost fishes.
megalocytosis noun: megaloblastic anemia
megalodisc noun: An abnormally large optic disc
megalodon noun: A species of extinct shark that lived during the Miocene and Pliocene epochs (†Otodus megalodon).
megalodontesid noun: Any of the wood wasps in the family Megalodontesidae
megalodontia noun /ˌmɛɡələʊˈdɒntɪə/: The condition of having proportionately oversized teeth for the jaw in which they are set.
megalodontid noun: Synonym of megalodontesid.
megaloencephaly noun: Alternative form of megalencephaly.
megalograph noun /ˈmɛɡələ(ʊ)ɡrɑːf/: A camera lucida that uses images from kaleidoscopes or microscopes
megalographic adjective: Of or relating to megalography.
megalography noun /ˌmɛɡəˈlɒɡrəfi/: The depiction of great or grand things, such as heroes and gods; painting on a large scale
megalograptid noun: Any of the Megalograptidae, a family of extinct eurypterids.
megalogue noun /ˈmɛɡəlɒɡ/: A simultaneous conversation involving a large number of people
megalokaryocyte noun: megakaryocyte
megalomania noun /ˌmɛɡəloʊˈmeɪniə/: A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence.
megalomaniac adjective, noun /ˌmɛɡəloʊˈmeɪniæk/: One affected with or exhibiting megalomania.
megalomaniacal adjective: Megalomaniac.
megalomaniacally adverb: In a megalomaniacal manner.
megalomaniacism noun: megalomania
megalomanic adjective: Afflicted by megalomania.
megalomartyr noun: Synonym of great martyr (“A saint who was martyred after suffering great torture”).
megalomycterid noun: Any of several largenose fish of the family Megalomycteridae which were shown in 2009 to be males of whalefish in the family Cetomimidae.
megalonychid noun: Any sloth in the family Megalonychidae.
megalonyx noun: An extinct ground sloth of the genus Megalonyx.
megaloolithid noun: Any fossilised dinosaur egg of the oogenus Megaloolithus
megalopa noun: The final larval stage found in decapod crustaceans
megalopal adjective: Relating to a megalopa
megalopenis noun: An abnormally large penis; macropenis, macrophallus
megalophallic adjective: macrophallic
megalophallus noun: An abnormally large penis; macropenis, macrophallus
megalophobia noun: The fear of large objects.
megalophonous adjective: Strident or pompous in expression; vociferous.
megalopic adjective: Having, or resembling large eyes
megalopid noun: Any fish in the family Megalopidae.
megalopolis noun /mɛ.ɡəˈlɒ.pə.lɪs/: A large conurbation, where two or more large cities have sprawled outward to meet, forming something larger than a normal metropolis.
megalopolistic adjective: Of or relating to a megalopolis.
megalopolitan adjective, noun /ˈmɛɡ.ə.ləˌpɒl.ɪ.tən/: An inhabitant or a resident of a megalopolis.
megalopolitanism noun: Megalopolitan attitudes generally.
megalopolization noun: The process of megalopolizing.
megalopolize verb: To turn into a megalopolis.
megalopore noun: A relatively large pore in the shell of a chiton
megalops noun: A larva, in a stage following the zoea, in the development of most crabs. In this stage the legs and abdominal appendages have appeared, the abdomen is...
megalopsia noun: macropsia
megalopsychia noun: greatness of soul; magnanimity
megalopsychos noun: Aristotle’s “great-souled man”: an aristocratic paragon who embodies the virtues to an exceptional degree (a figure described chiefly in Aristotle’s...
megalopsychy noun: Excessive self-confidence
megalopteran adjective, noun: Of or pertaining to the insect order Megaloptera
megalopterous adjective /ˌmɛɡəˈlɒptərəs/: Relating to or characteristic of the order Megaloptera, which comprises insects with large wings and aquatic larvae.
megalopygid noun: Any moth in the family Megalopygidae.
megalord noun: One who holds power higher than others.
megalosaur noun: A carnivorous dinosaur of the family Megalosauridae.
megalosaurian adjective, noun: A dinosaur of the genus Megalosaurus.
megalosaurid noun: Any dinosaur of the family Megalosauridae.
megalosauroid adjective, noun: Relating to, or characteristic of, a megalosaurid.
megalosaurus noun: A theropod dinosaur of the genus Megalosaurus.
megaloschizogony noun: Asexual reproduction of protozoans characterized by very large schizonts.
megaloschizont noun: A very large schizont
megaloscope noun: A type of speculum that magnifies the orifice.
megalospermatogonium noun: A megalohead spermatogonium
megalosphaeric adjective: Alternative spelling of megalospheric.
megalosphere noun: A foraminifer that has a large initial chamber
megalospheric adjective: Relating to megalospheres
megalosplanchnic adjective: Synonym of macrosplanchnic.
megalosplenia noun: Synonym of splenomegaly.
megaloud adjective: Extremely loud.
megaloureter noun: megaureter
megalourethra noun: A form of uropathy characterized by severe dilatation of the penile urethra
megalurid noun: Any warbler in the family Megaluridae, a synonym for the Locustellidae.
-megaly adverb, suffix /ˈmɛ.ɡə.liː/: enlargement
megalyrid noun: Any wasp in the family Megalyridae.
megamachine noun: A very large or powerful machine (or computer).
megamall noun: A very large mall (shopping centre).
megamammal noun: A very large mammal, especially an extinct one.
megaman noun: A very large or powerful man.
megamansion noun: A very large mansion.
megamarathon noun: A major marathon with a large number of participants.
megamarket noun: A market that is very large.
megamarsh noun: A very large marsh
megamaser noun: Any celestial object exhibiting enormous maser activity
megamedia noun: Large, corporate media.
megamenu noun: A dropdown menu that expands into a relatively large and complex interface rather than a simple vertical list of commands.
megamer noun: A cross-linked dendritic polymer.
megamerge verb: To merge into a megamerger.
megamerger noun: A particularly large economic merger.
megamerinid noun: Any member of the Megamerinidae.
megameter noun /mɛˈɡɐˌmɪtə/: An instrument for determining longitude by observation of the stars.
megametre noun: A distance of 1,000 km.
megamho noun: A former unit of electrical conductance, equivalent to one million mhos.
megamidden noun: An exceptionally large midden
megamillennium noun: A period of time consisting of a million years.
megamillion noun: A great number of millions.
megamillionaire noun: A person who has many times more than one million units of the local currency, but who is not a billionaire.
megamillionairess noun: A female megamillionaire.
megamind noun: A mind that is composed of other minds nested within it.
megamine noun: A very large mine (site where minerals are dug up).
megaministry noun: A very large (especially religious) ministry.
Megaminx noun: A puzzle similar to a Rubik's Cube but shaped like a dodecahedron
megamitochondrion noun: A very large, misshapen mitochondrion
megamix noun: A remix taking the form of a medley, with radical alterations and many constituent pieces of music.
megamodel noun: A megascale model.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0): each word's first meaning. A word with a page of its own links to it; for the rest, this line is PlainSpell's entry. Total under M: 47,683 words, in 159 parts.