English Words: M
36,575 words · Page 239 of 732
An extinct, gigantic, ground sloth (Megatherium americanum) that flourished in South America during the Pleistocene epoch.
One of a family of extinct edentates found in America, including the megatherium and the megalonyx, among others.
Any theropod dinosaur that exceeds 3000 kilograms in weight, and 9 meters in length.
A sudden large-scale slip along a fault between a subducting and an overriding plate, resulting in a major earthquake.
A greatly desirable addition to the list of birds one has seen, usually because it is rare or seldom seen.
A measure of the strength of an explosion or a bomb based on how many million tons of TNT would be needed to produce the same energy. (A derived unit for TNT equivalent.)
A site showing geological evidence of very large numbers of fossil tracks or trace fossils.
A very large trial (of a pharmaceutical etc), sometimes made up of several normal trials.
An extremely large tsunami-like wave caused by an avalanche or landslide displacing large amounts of water very quickly.
A theoretical higher-order universe that contains multiple (possibly an infinite number of) pocket universes within it.
A unit of fame equal to 1 million warhols, or 15 million minutes of fame (about 28.5 years).
One million (1 000 000) watts, an amount of power large enough to power such things as an entire commercial building or a small passenger aircraft. (Consuming 1 megawatt during a duration of 1 hour consumes 1 megawatt-hour of energy.)
A unit of energy equal to that provided by one megawatt acting for one hour (3·6 × 10⁹ joules).
A unit of energy equal to that provided by one megawatt acting for one year (31·536 × 10¹² joules).
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 239. 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.