Meaning of MICROMETER in English

MICROMETER

I. mi·crom·e·ter mī-ˈkrä-mə-tər 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

]

II. mi·cro·me·ter ˈmī-krō-ˌmē-tər noun

Etymology: International Scientific Vocabulary micr- + meter (III)

Date: 1880

: a unit of length equal to one millionth of a meter — called also micron — see metric system table

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.