micrometer
UK /maɪˈkɹɒmɪtə/ · US /maɪˈkɹɑmɪtəɹ/ noun
Forms micrometers
- noun A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.
Synonyms
Etymology
From French micromètre, equivalent to micro- + -meter.
From micro- (“one millionth”) + meter.
Webster’s 1913
- noun An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass.
Etymology [Micro- + -meter: cf. F. micromètre.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “micrometer”, CC BY-SA 4.0. Details