单词 | pachometer |
释义 | pachometern. Any of various instruments used to measure thickness, originally of the glass of mirrors, but later also of paper, concrete, etc.; (Ophthalmology) an instrument for measuring the thickness of the cornea of the eye, typically using either light from a slit lamp or ultrasound. Also called pachymeter. ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > for measuring thickness scantillona1300 eriometer1829 pachometer1857 pachymeter1881 1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Pachometrum, name of an instrument invented by Benoît for measuring the thickness of the glass of mirrors: a pachometer. 1875 E. H. Knight Amer. Mech. Dict. II. 1590/1 Pachometer, an instrument for measuring the thickness of the glass of mirrors. 1965 Science 26 Nov. 1167/2 Corneal thickness was measured with an optical pachometer. 1986 Amer. Jrnl. Optometry & Physiol. Optics 63 462 Comparisons are made between measurements from the ultrasonic pachometer and measurements from the thickness gauge and optical pachometer. 1998 Guidelines for Condition Surv. Waterfront Struct. (Port Authority N.Y. & New Jersey) 34 In the context of concrete structures, a pachometer is used for measuring the clear concrete over embedded reinforcing steel. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < n.1857 |
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