单词 | seed crystal |
释义 | > as lemmasseed crystal seed crystal n. a small crystal of a substance deliberately introduced into a liquid in order to promote further crystal growth, originally in sugar manufacture; any small crystal which acts as a nucleus for crystal formation.Cf. sense 8.In quot. 1993 in figurative context. ΚΠ 1901Seed crystals [see sense 8]. 1934 Industr. & Engin. Chem. 26 ii. 1201/1 The initial formation of crystal nuclei is profoundly influenced by the chance presence of very small seed crystals of the solute. 1993 M. Flynn In Country of Blind 182 The wonderful thing about memetic engineering..was that a few trite proverbs dropped into a discussion acted as seed crystals in a supersaturated solution. 2001 O. Sacks Uncle Tungsten vii. 68 If I used an alum solution and a good seed crystal to start it off..the crystal would grow evenly. < as lemmas |
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