Micrometer

- + meter

Alternative forms

• micrometre UK

Full definition of micrometer

Noun

1. An SI/MKS unit of measure, the length of one one-millionth of a meter. Symbols: µm, um, rm

Synonyms

• micron obsolete

From French micrometre

Noun

1. A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.

Anagrams

• micrometre