Etymology

micrometre

M3I1C3R1O1M3E1T1R1E1

Today it means: An SI and mks unit of measure, the length of one-millionth of a metre. Symbol: μm, um, μ. Full definition →

English metre ← Ancient Greek μῑκρο- (mīkro-) ← Proto-Indo-European *mey-der.?
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The story

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

From micro- + metre.

Etymology from Wiktionary, CC BY-SA 4.0.