n.
Pronunciation: m ī - ' krä-m ə -t ə r
Function: noun
Etymology: French micromètre, from micr- + -mètre -meter
Date: 1670
1 : an instrument used with a telescope or microscope for measuring minute distances
2 : a caliper for making precise measurements that has a spindle moved by a finely threaded screw
micrometer 2