Micron

//ˈmaɪkɹɒn// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    Synonym of micrometre (“one-millionth of a metre”).

    "2009, Jonathan Amos, (bbc.co.uk) Satellites weigh California water As one spacecraft lurches and drags through the Earth's uneven gravity field, the second follows 210 km behind, measuring changes in their separation to the nearest micron (a thousandth of a millimetre)."

  2. 2
    Synonym of breve.
  3. 3
    a metric unit of length equal to one millionth of a meter wordnet
  4. 4
    A very tiny amount. figuratively

Synonyms

All synonyms
micrometremicrometerbrevebrevekilometermeasure

Antonyms

All antonyms
macron

Example

More examples

"2009, Jonathan Amos, (bbc.co.uk) Satellites weigh California water As one spacecraft lurches and drags through the Earth's uneven gravity field, the second follows 210 km behind, measuring changes in their separation to the nearest micron (a thousandth of a millimetre)."

Etymology

Etymology 1

From French micron, from Ancient Greek μικρόν (mikrón), neuter of μικρός (mikrós, “small”).

Etymology 2

From Ancient Greek μικρόν (mikrón), neuter of μικρός (mikrós, “small”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.