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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)

microphysics
nounC2+
/ˌmaɪkrəʊˈfɪzɪks/The branch of physics that deals with the structure and behaviour of atoms, molecules, and other systems at the atomic or subatomic level.
microphyte
nounVery Low
/ˈmaɪkrə(ʊ)ˌfʌɪt/A microscopic plant, especially a unicellular alga or a small plant-like organism.
micropipette
nounC2
/ˈmaɪ.krəʊ.paɪˈpɛt/A laboratory instrument for accurately measuring and transferring very small volumes of liquid.
microplankton
nounLow to Very Low (C2)
/ˌmaɪkrəʊˈplæŋ(k)tən/Plankton of microscopic size, typically between 20 and 200 micrometres in diameter, forming a crucial part of marine and freshwater food webs.
microplastic
nounC1
/ˈmaɪ.krəʊˌplæs.tɪk/An extremely small piece of plastic debris in the environment, typically measuring less than 5mm, resulting from the disposal and breakdown of consumer products and industrial waste.
micropore
nounC2
/ˈmaɪ.krəʊ.pɔː/A very small pore or opening, typically one measurable in micrometres.
micropower
nounC2
/ˈmaɪkrəʊˌpaʊə/A very small amount of electrical power, typically in the milliwatt or microwatt range.
microprint
nounC2
/ˈmaɪ.krəʊ.prɪnt/Extremely small printed text, typically used as a security feature on documents like banknotes, cheques, or identification cards to prevent counterfeiting.
microprism
nounVery Low
/ˈmaɪ.krəʊˌprɪz.əm/A very small prism, typically one of many arranged in an array, used to manipulate light in optical devices.
microprobe
nounC2
/ˈmaɪ.krəʊ.prəʊb/A scientific instrument that uses a focused beam of electrons or ions to analyze the chemical composition of a very small area of a material.
microprocessor
nounC1
/ˌmaɪ.krəʊˈprəʊ.ses.ər/An integrated circuit that contains the functions of a central processing unit (CPU) of a computer.
microprogram
nounC2/Professional
/ˈmaɪkrəʊˌprəʊɡræm/A low-level set of instructions that controls the operation of a computer's central processing unit (CPU) at the hardware level.
microprogramming
nounC2
/ˈmaɪkrəʊˌprəʊɡræmɪŋ/A low-level programming technique where the control logic of a computer's central processing unit (CPU) is implemented as a sequence of basic instructions called microcode.
microprojector
nounC1
/ˌmaɪ.krəʊ.prəˈdʒek.tər/A small, portable device that projects a magnified image or video from a tiny source (e.g., a slide, smartphone, or microfilm) onto a screen or surface.
micropropagation
nounLow (technical term)
/ˌmaɪkrəʊˌprɒpəˈɡeɪʃən/A technique in plant biology involving the asexual reproduction of plants from very small plant tissues, often in a laboratory setting.
micropsia
nounVery Low
/maɪˈkrɒp.si.ə/A medical and neurological condition where objects appear smaller than they actually are.
micropublish
verb-transitiveC1-C2 / Very Low Frequency
/ˈmaɪ.krəʊ.ˌpʌb.lɪʃ/To publish content, especially digital media, in small, discrete units (e.g., a single blog post, tweet, or short video) rather than as part of a larger collection or traditional publication.
micropump
nounLow
/ˈmaɪkrəʊˌpʌmp/A very small device used to move, control, or manipulate minute volumes of fluid (often on the scale of microliters or less).
micropyle
nounC1
/ˈmaɪkrə(ʊ)paɪl/A minute opening in the surface of an ovule of a seed plant through which the pollen tube usually enters.
micropyrometer
nounVery Low
/ˌmaɪ.krəʊ.paɪˈrɒm.ɪ.tə/An instrument for measuring extremely high temperatures, typically by using a microscopic filament that is heated until its brightness matches that of the object being measured.

Showing 4721–4740 of 8594 words.