microinch

[ mahy-kroh-inch ]
/ ˈmaɪ kroʊˌɪntʃ /

noun

a unit of length equal to one millionth of an inch. Symbol: μin

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Origin of microinch

First recorded in 1940–45; micro- + inch1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020