| 单词 | screw micrometer |
| 释义 | > as lemmasscrew micrometer screw micrometer n. (in microscopy) a micrometer in which measurements are taken using two fine, parallel threads or wire which are moved towards or away from the other by turning a precisely calibrated screw. ΚΠ 1795 J. Banks Treat. Mills iii. 98 The wire was afterwards broken into a number of pieces, which..were also measured by a screw micrometer. 1906 Harvard Engin. Jrnl. 5 98 This can always be done by using the small motion obtained by reducing with a lever the motion of a good screw micrometer. 2013 M. C. Hunter Wicked Intelligence ii. 72 Although it too is an instrument of precision optics, a screw micrometer promises much less to visual perception than does a telescope or microscope. < as lemmas |
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