English Words: M

36,575 words · Page 289 of 732

mesoprefrontaladj

In the middle of the prefrontal region

mesoproductionnoun

The production of mesons.

mesoprogestinnoun

A progesterone receptor modulator used to control endometriosis and similar disorders

Mesoproterozoicadj

Of a geologic era within the Proterozoic eon; comprises the Calymmian, Ectasian and Stennian periods from about 1600 to 900 million years ago, when the Rodinia supercontinent was formed.

mesoproximaladj

mesal and proximal

mesopsammicadj

Of or pertaining to the interstitial spaces of marine sand.

mesopsammonnoun

Community of small species that live in mesopsammic spaces where water is filtered between grains of sand and fine gravel.

mesopterygiumnoun

The middle one of the three main basal plates in the fins of certain fishes.

mesopterygoidadj

Between the pterygoid bones

mesoptilenoun

one of the second set of down feathers (in those birds that have two sets)

mesopubicadj

Having the pubis bone centrally / medially located

mesopuncturenoun

A form of acupuncture in which fluid is injected through the needle points.

mesornoun

A mean value based on the distribution of values across the cycles of the circadian rhythm, computed using a cosine function.

mesorahnoun

tradition

mesorchiumnoun

The fold of peritoneum that attaches the testis to the dorsal wall of the body cavity or scrotum.

Mesorename

The twelfth and last month of the later ancient Egyptian civil calendar and Coptic calendar, corresponding to the fourth and last month of the season of Shemu. Since 25 BCE, when the calendar was reformed to include leap-days, Mesore has been in roughly August.

mesorectaladj

Of or pertaining to the middle part of the rectum

mesorectumnoun

The fold of peritoneum, or mesentery, attached to the rectum.

mesoregionnoun

An administrative area in Brazil comprising a group of municipalities

mesorhineadj

Having a medium-width nose, between leptorhine and platyrhine.

mesorhizobianoun

plural of mesorhizobium

mesorhizobiumnoun

Any Gram-negative bacterium of the genus Mesorhizobium

mesoridazinenoun

A phenothiazine tranquilizer C₂₁H₂₆N₂OS₂ used formerly especially in the treatment of schizophrenia and anxiety.

mesoriparianadj

Relating to a mesic riparian zone.

mesorostraladj

In the middle of the rostrum (beak)

mesorrhineadj

Having a nose that is neither especially narrow nor especially broad.

mesosalineadj

Of a body of water, of intermediate salinity.

mesosalpinxnoun

Part of the lining of the abdominal cavity in higher vertebrates, specifically the portion of the broad ligament that stretches from the ovary to the level of the uterine tube.

mesosaurnoun

Any of a group of small aquatic reptiles, from the early Permian period, of the order †Mesosauria.

mesoscaleadj

Of medium size or extent; between microscale and macroscale.

mesoscaphenoun

A submersible submarine designed for drifting on sea currents in the middle depth layers of the ocean.

mesoscapulanoun

A process from the middle of the scapula in some animals; the spine of the scapula.

mesoscapularadj

Of or pertaining to the mesoscapula.

mesoscopicadj

On a scale between microscopic and macroscopic

mesoscopicallyadv

In a mesoscopic manner, or on a mesoscopic scale

mesoscopynoun

The visual study of objects on a mesoscopic scale.

mesoscutaladj

Relating to the mesoscutum.

mesoscutellaradj

Relating to the mesoscutellum.

mesoscutellumnoun

The middle part of the arthropod scutellum

mesoscutumnoun

The scutum or dorsal plate of the middle thoracic segment of an insect.

mesosemeadj

Having a medium orbital index, between megaseme and microseme.

mesosideritenoun

A stony meteorite containing roughly equal proportions of silicate and nickel-iron metal

mesosigmoidnoun

The mesentery that attaches the sigmoid colon to the posterior abdominal wall.

mesosigmoidaladj

Pertaining to the mesosigmoid.

mesosomanoun

The middle part of the body, or tagma, of arthropods whose body is composed of three parts (the other two being the prosoma and the metasoma), bearing the legs and (in winged insects) the wings.

mesosomaladj

Relating to the bacterial mesosome.

mesosomenoun

A folded invagination in the plasma membrane of bacteria, produced by the chemical fixation techniques used to prepare samples for electron microscopy, but previously thought to be part of the normal structure of the cell.

mesosomicadj

Synonym of mesosomal.

mesosonicadj

Describing motion through a two-phase medium, usually electrons and heavy ions, at a speed between the speeds of sound in the two components.

mesospermalegenoun

Part of the spermalege, derived from the mesoderm; it is a membrane-bound sac attached to the wall of the haemocoel, directly beneath the groove of the ectospermalege.

Spelling & Dictionary Insight

The English alphabetical index for the letter M contains 36,575 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 732 pages, and you are currently viewing page 289. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "M" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.