From Longman Dictionary of Contemporary Englishmicrometermi‧crom‧e‧ter /maɪˈkrɒmɪtə $ -ˈkrɑːmɪtər/ noun [countable] an instrument for measuring very small distances
Examples from the Corpus
micrometer• And you had to sign a chit to use things like the height gauge, the big micrometers, calipers.• Single-mode fibres also operate at 1.3 micrometres, but they have cores only a few micrometers across.• The heights of accumulation at known time intervals are measured by optical micrometer and the particle sizes calculated from these figures.• She appeared to be searching for dust, fussing over square micrometers where maybe some of it had landed.• They have a diameter of about three micrometers. 