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English Words Starting With M

8,594 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

megaspore
nounC2
/ˈmɛɡəspɔː/A large, haploid spore produced by some plants and algae that develops into a female gametophyte.
megaspore mother cell
nounC2
/ˈmɛɡəˌspɔː ˈmʌðə sɛl/A diploid cell in a plant's ovule that undergoes meiosis to produce four haploid megaspores, only one of which typically develops into the female gametophyte.
megasporogenesis
nounVery Rare
/ˌmɛɡəˌspɔːrə(ʊ)ˈdʒɛnɪsɪs/The process of forming megaspores (large spores that develop into female gametophytes) within the ovule of a seed plant.
megasporophyll
nounVery Low
/ˌmɛɡəˈspɔːrəfɪl/A specialised leaf or bract that bears megasporangia, which produce megaspores, typically found in gymnosperms and some ferns.
megass
nounRare / Technical
/ˈmɛɡəs/The fibrous residue left after sugar cane has been crushed to extract juice, used as fuel or animal feed.
megastar
nounC1
/ˈmɛɡəstɑː/An extremely famous and successful performer, especially in music or film.
megastructure
nounC1
/ˈmɛɡəˌstrʌktʃə/A very large, complex, and typically self-contained building or interconnected complex of buildings.
megathere
nounVery Low (C2+)
/ˈmɛɡəˌθɪə/A large, extinct ground sloth.
megatherm
nounVery low
/ˈmɛɡəˌθɜːm/A plant adapted to live in consistently hot, tropical climates with minimal temperature variation.
megaton
nounC1
/ˈmeɡətʌn/A unit of explosive energy equivalent to one million tons of TNT.
megatonnage
nounC2
/ˈmɛɡəˌtʌnɪdʒ/The total explosive power, measured in millions of tons (megatons) of TNT, of a collection of nuclear weapons or a specific nuclear arsenal.
megatrend
nounC1
/ˈmeɡətrend/A very large, pervasive, and long-term trend that significantly influences many aspects of society, technology, business, or culture.
megavitamin
adjectivenounC2
/ˈmeɡəˌvɪtəmɪn/A pill or tablet containing a very large dose of a vitamin.
megavolt
nounC2 - Very Low Frequency
/ˈmeɡəˌvəʊlt/A unit of electrical potential equal to one million volts.
megawatt
nounB2
/ˈmeɡəwɒt/A unit of power equal to one million watts.
meges
nounLow
/ˈmeleɪ/Not a standard English word. Likely a misspelling of 'mêlée', a noun meaning a confused, noisy fight or struggle among a group of people.
megger
nounC2
/ˈmɛɡə/A brand name that has become a generic term for an insulation resistance tester, an electrical instrument used to measure high resistance values, particularly to check the integrity of wire insulation or motor windings.
meghalaya
nounC2
/ˌmeɪɡəˈlaɪə/A state in northeastern India, its name meaning 'abode of clouds'.
meghan
nounLow (as a common noun/verb it does not exist; frequency pertains only to its use as a proper noun)
/ˈmɛɡən/A feminine given name of Welsh origin, meaning 'pearl'.
megiddo
nounC2 (Very Rare)
/mɪˈɡɪdəʊ/A historic fortified city in northern Israel.

Showing 3361–3380 of 8594 words.