micrometre

M3I1C3R1O1M3E1T1R1E1
UK/ˈmaɪkɹəˌmiːtə/US/ˈmaɪkɹəˌmitəɹ/

noun

An SI and mks unit of measure, the length of one-millionth of a metre. Symbol: μm, um, μ.

“Meronyms: picometre < nanometre”

Similar
micronmicrometer
OriginEnglish metre ← Ancient Greek μῑκρο- (mīkro-) ← Proto-Indo-European *mey-der.? →
Scrabble 16
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Meanings

nounmicrometre (plural micrometres)

plural micrometres

  1. An SI and mks unit of measure, the length of one-millionth of a metre. Symbol: μm, um, μ.

    Meronyms: picometre < nanometre

    1 more example

    Holonyms: millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre

    Synonyms: micron

Synonyms & antonyms

nounAn SI and mks unit of measure, the length of one-millionth of a metre. Symbol: μm, um, μ.

Similar
micron

More synonyms by meaning

nouna metric unit of length equal to one millionth of a meter

Similar
micronmicrometer
Broader
metric linear unit
Also see
micrometermicron

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*mey-der.?
  2. Ancient Greekμῑκρός (mīkrós)
  3. Ancient Greekμῑκρο- (mīkro-)
  4. Englishmicro-
  5. Englishmetre
  6. Englishmicrometre

From micro- + metre.

Full word history & related roots →

Rhymes & wordplay

Anagrams

micrometer
Cite this entry
APA

micrometre. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/micrometre

MLA

“micrometre.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/micrometre. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “micrometre,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/micrometre.

Source: micrometre on Wiktionary, CC BY-SA 4.0.