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▪ I. preˈcipitating, vbl. n.
[f. precipitate v. + -ing1.]
The action of the verb precipitate; usually = precipitation 5. Also attrib.
1664Power Exp. Philos. i. 62 By attenuating the grosser parts..volatilizing some, precipitating of others. 1683Pettus Fleta Min. i. (1686) 83 The Philosophers do write of precipitating, by which the Silver in common tin may be put down. 1877Raymond Statist. Mines & Mining 400 The bath after it is withdrawn from the precipitating-tanks generally contains a little copper. 1887Daily News 31 Oct. 2/6 Thirteen precipitating tanks on the land side of the existing reservoir will receive the sewage.
▪ II. preˈcipitating, ppl. a.
[f. as prec. + -ing2.]
That precipitates, in various senses.
†1. Steep, precipitous. Obs.
1615G. Sandys Trav. iii. 183 This Caue is..hewne out of the precipitating rocke. 1632Lithgow Trav. vi. 278 The Ponds being hewne out..from the deualling face of a precipitating mountaine.
2. Falling headlong from a height; sinking to the bottom, as a deposit from a liquid. ? Obs.
1756T. Amory Buncle (1825) II. 122 Some were covered with forest and some with precipitating streams. 1799Kirwan Geol. Ess. 40 The progressive motion impressed upon the precipitating masses.
†3. Coming abruptly, abrupt or sudden. Obs.
1638Sir T. Herbert Trav. (ed. 2) 35 Yet ere death cald for them, they were cald for, by precipitating ends.
4. Impelling headlong; hurrying violently.
1815Shelley Alastor 321 A whirlwind swept it on, With fierce gusts and precipitating force.
†5. Plunging into action without consideration; acting too hastily or rashly, precipitate. Obs.
1681D'Urfey Progr. Honesty iv, So the reverend Sire..thus begun To pitty and instruct his just precipitating Son. 1754Richardson Grandison VI. xxx. 195 A man so generous, tho' so precipitating.
6. Chem. Causing precipitation from solution or from a gas.
1904Brit. Med. Jrnl. 10 Sept. 573 The precipitating action of egg-albumen precipitin. 1912Jrnl. Franklin Inst. CLXXIV. 262 The brush form of discharge from points is only a good precipitating agent when the current of gas is small. |