micrometer
n.
1660s, from micro- + -meter. Originally a telescope attachment; from 1884 as a craftsman's fine measuring tool. Related: Micrometry; micrometric.
词汇 | micrometer |
词根词缀 | Online Etymology Dictionary micrometer n. 1660s, from micro- + -meter. Originally a telescope attachment; from 1884 as a craftsman's fine measuring tool. Related: Micrometry; micrometric. |
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