| 单词 | grease-spot photometer |
| 释义 | > as lemmasgrease-spot photometer grease-spot n. (a) a spot of grease (on clothes, etc.); (b) slang (see quot. 1860); (c) a spot of grease used in photometry; so grease-spot photometer. ΘΚΠ society > society and the community > dissent > fighting > [noun] > one who fights > remains of adversary grease-spot1829 1829 in Amer. Speech (1965) 40 129 I hit a man..dere was nothing left, Sept a little grease spot. 1839 Mag. Domest. Econ. 4 214 Grease-spots may be removed from woollen cloths by [etc.]. 1843 T. C. Haliburton Attaché II. viii. 143 If you was to look at me with a ship's glass you wouldn't see a grease spot of it in me. 1860 Slang Dict. Grease-spot, a minute remnant, the only distinguishable remains of an antagonist after a terrific contest. 1882 Encycl. Brit. XIV. 584/1 Bunsen has recently suggested the very simple expedient of making a grease-spot on white paper for photometric purposes. When the paper is equally illuminated from both sides, the grease-spot cannot be seen except by very close inspection... The amounts of light are as the squares of the distances of the sources from this point [sc. the grease-spot]. 1911 R. S. Clay Treat. Pract. Light xviii. 388 The grease-spot photometer is perhaps the most sensitive to scattered light. 1923 R. Glazebrook Dict. Appl. Physics IV. 416/2 As a convenient example, the simple form of the Bunsen grease-spot photometer may be described. < as lemmas |
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