| 释义 |
cyan-
1. Combining form of Gr. κύανος and κυάνεος ‘dark-blue’ before a vowel: see following words, and cyano-, also cyan-blue.
2. Chem. = cyano- 2, used as combining form of cyanogen before a vowel, and in names of cyanogen compounds and derivatives, as in cyanamide, cyanate, cyanic, cyanide n., etc. Also cyanˈhydric a. = hydrocyanic. cyaˈnuramide, an organic base polymeric with cyanamide; also called melamine. cyaˈnurate, a salt of cyaˈnuric [uric], or cyanuˈrenic acid, an acid polymeric with cyanic acid, obtained by heating dry urea in a flask; it is inodorous and not poisonous. cyaˈnylic [-yl] cyanylic acid, an acid isomeric with cyanuric acid; a salt of this is a cyˈanylate. Also cyanacetate, cyanethine, etc.
1838T. Thomson Chem. Org. Bodies 208 Cyanuric acid. This acid..has been described in the Chemistry of Inorganic Bodies (vol. ii. p. 227), under the name of cyanic acid. Ibid. 211 Cyanilic acid was discovered by M. Liebig in 1833. 1869Roscoe Elem. Chem. 369 Obtained synthetically by the action of potash upon ethyl cyanacetate. 1877Watts Fownes' Chem. II. 97 Cyanuric acid is changed by a very high temperature into cyanic acid. |