micrometre

See also: micromètre, micro-metre, and micrometer

English

This image of a hair under a scanning electron microscope has a fiducial marker showing 50 micrometres, which gives you an intuitive grasp of how small 1 micrometre is.

Etymology

Etymology tree

Proto-Indo-European *mey-der.?

Ancient Greek μῑκρός (mīkrós)

Ancient Greek μῑκρο- (mīkro-)lbor.

English micro-

English metre

English micrometre

From micro- + metre.

Pronunciation

• (Received Pronunciation) IPA^(key): /ˈmaɪkɹəˌmiːtə/
• (General American) IPA^(key): /ˈmaɪkɹəˌmitəɹ/

Noun

micrometre (plural micrometres)

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

   Alternative form: micrometer (US)

   Synonym: micron (deprecated)

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

   Meronyms: picometre < nanometre

Translations

micrometer — see micrometer

Anagrams

• micrometer