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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)

metallocene
nounVery Low
/mɪˈtælə(ʊ)ˌsiːn/An organometallic compound with a central metal atom or ion bonded to two cyclopentadienyl rings in a parallel, sandwich-like structure.
metallograph
nounVery Low
/mɪˈtæləˌɡrɑːf/A photograph or micrograph of the structure of a metal or alloy, typically taken through a microscope.
metallography
nounC2
/ˌmet.əˈlɒɡ.rə.fi/The scientific study of the microscopic structure and properties of metals and alloys.
metalloid
adjectivenounC2
/ˈmɛtəlɔɪd/A chemical element with properties intermediate between those of metals and nonmetals.
metallophone
nounC2
/mɪˈtæl.ə.fəʊn/A percussion instrument consisting of tuned metal bars that are struck with a mallet to produce musical tones.
metallotherapy
nounVery Low
/məˌtæləʊˈθɛrəpi/A historical or alternative medical treatment involving the application of metals to the body.
metallurgy
nounLow frequency (C1/C2 level)
/mɪˈtælədʒi/The science and technology of extracting metals from their ores and processing them for use.
metalmark
nounRare / Technical
/ˈmɛt(ə)lmɑːk/A small, brightly colored butterfly of the family Riodinidae, often with metallic markings on its wings.
metalogic
nounC2
/ˌmet.əˈlɒdʒ.ɪk/The study of the properties of logical systems themselves, such as their consistency, completeness, and expressive power. It is the theory about a logic, rather than the practice of reasoning within that logic.
metalsmith
nounLow
/ˈmɛt(ə)lsmɪθ/A person who works with metal to create or repair objects, especially through forging, shaping, or joining.
metalware
nounLow
/ˈmetlweə(r)/Household articles, utensils, or decorative objects made of metal.
metalwork
nounB2
/ˈmetlwɜːk/The activity or skill of making objects out of metal, such as gates, railings, jewellery, or sculptures.
metalworking
nounB2
/ˈmetlˌwɜːkɪŋ/The craft or process of working with metals to create objects, parts, or structures, often through techniques like forging, casting, cutting, and joining.
metamale
nounVery Low
/ˈmetəmeɪl/A biological male whose sex chromosome complement is X0 (one X chromosome and no Y chromosome), resulting from non-disjunction during meiosis.
metamathematics
nounC2
/ˌmetəˌmæθəˈmætɪks/The study of the logical and philosophical foundations of mathematics; mathematics about mathematics.
metamer
nounC2/Extremely Low
/ˈmɛtəmə/One of two or more chemical compounds (isomers) with identical molecular formulas but different arrangements of atoms in space, or, in colorimetry, colours that match under one light source but not under another.
metamere
nounRare
/ˈmɛtəmɪə/A segment of the body of an animal, repeated along the anterior-posterior axis, especially in segmented invertebrates (e.g., earthworms) and some vertebrates (e.g., fish) during embryonic development.
metamerism
nounC2/Technical
/mɪˈtæm.ər.ɪ.zəm/A phenomenon where two objects appear identical in colour under one light source but different under another; in biology, the segmented body plan of certain animals.
metamorphic facies
nounLow (Specialist Technical)
/ˌmɛtəˈmɔːfɪk ˈfeɪʃiːz/A distinct set of metamorphic mineral assemblages formed under a specific, defined range of pressure and temperature conditions, used to classify metamorphic rocks.
metamorphism
nounC2
/ˌmɛtəˈmɔːfɪz(ə)m/The process by which rocks are changed in mineral composition, texture, or structure by heat, pressure, or chemically active fluids, without melting.

Showing 4161–4180 of 8594 words.