Main Entry: ¹mi·crom·e·ter

Pronunciation: \mī-ˈkrä-mə-tər\

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 illustration]