Browse by letter

English Words Starting With M

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

Filter

Parts of speech

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

micron
nounLow (C2 Level)
/ˈmaɪkrɒn/A unit of length equal to one millionth of a metre.
micronation
nounLow
/ˈmaɪkrəʊˌneɪʃ(ə)n/A small, self-proclaimed entity that claims to be an independent nation or sovereign state but is not recognized by world governments or major international organisations.
micronesia
nounB2
/ˌmaɪ.krəʊˈniː.zi.ə/A region in the western Pacific Ocean, consisting of thousands of small islands.
micronesian
adjectivenounC1
/ˌmaɪ.krəˈniː.zi.ən/Relating to Micronesia, a region in the Pacific Ocean comprising thousands of small islands, or to its peoples, cultures, or languages.
micronize
verbLow
/ˈmaɪkrənaɪz/To reduce a substance to very fine particles, typically in the range of a few micrometres.
micronucleus
nounVery low
/ˌmaɪ.krəʊˈnjuː.klɪ.əs/A small, distinct nucleus found in some single-celled organisms or a small, extra nucleus-like structure formed from chromosome fragments in a cell.
micronutrient
nounC1
/ˌmaɪkrəʊˈnjuːtriənt/A chemical element or substance that organisms require in very small amounts for proper growth and development, such as vitamins or trace minerals.
microorganism
nounB2-C1
/ˌmaɪ.krəʊˈɔː.ɡən.ɪ.zəm/A microscopic living entity, including bacteria, viruses, fungi, archaea, and protozoa.
micropalaeontology
nounVery Low
/ˌmaɪ.krəʊ.ˌpæl.i.ɒn.ˈtɒl.ə.dʒi/The branch of palaeontology that deals with microscopic fossils.
micropaleontology
nounVery Low
/ˌmaɪ.krəʊ.ˌpæl.i.ɒnˈtɒl.ə.dʒi/The branch of paleontology dealing with the study of microscopic fossils, such as foraminifera, diatoms, and pollen.
microparasite
nounVery Low (C2)
/ˌmaɪ.krəʊˈpær.ə.saɪt/A parasite, such as a bacterium or virus, that is microscopic in size and multiplies rapidly within its host organism.
micropathology
nounC2
/ˌmaɪ.krəʊ.pəˈθɒl.ə.dʒi/The microscopic study of diseased tissues and cells; the branch of pathology concerned with minute structural changes caused by disease.
micropayment
nounC1
/ˈmaɪ.krəʊˌpeɪ.mənt/A very small financial transaction, typically online, often for digital content or services.
microphage
nounRare
/ˈmaɪkrə(ʊ)feɪdʒ/A small phagocytic white blood cell, such as a neutrophil, that engulfs and destroys bacteria and other small particles.
microphanerophyte
nounVery low
/ˌmaɪkrə(ʊ)ˈfænərə(ʊ)faɪt/A perennial woody plant whose renewal buds are located between 0.5 and 8 meters above ground level.
microphone
nounB1
/ˈmaɪ.krə.fəʊn/An instrument for converting sound waves into electrical energy variations, which may then be amplified, transmitted, or recorded.
microphonism
nounRare / Technical
/ˈmaɪkrə(ʊ)ˌfəʊnɪz(ə)m/An unwanted, low-level background noise or signal produced by an electronic component, particularly a vacuum tube or microphone, due to mechanical vibration or acoustic feedback.
microphotograph
nounC1/C2 – Very low-frequency, technical/specialist vocabulary.
/ˌmaɪ.krəʊˈfəʊ.tə.ɡrɑːf/A photograph taken through a microscope; a photograph of something so small it can only be seen clearly through magnification.
microphotometer
nounVery Low
/ˌmaɪkrə(ʊ)fəʊˈtɒmɪtə/A highly sensitive scientific instrument for measuring the intensity of light, particularly on a microscopic scale, such as from a spectral line or a small area of a photographic film or plate.
microphyll
nounC1/C2 (Specialized Academic/Technical)
/ˈmaɪkrə(ʊ)fɪl/A small leaf with a single unbranched vein, characteristic of some ancient and primitive plants, especially club mosses.

Showing 4701–4720 of 8594 words.