| 单词 | precipitate |
| 释义 | precipitate —precipitately, adv. —precipitateness, n. —precipitative, adj. —precipitator, n. v. /pri sip"i tayt'/; adj. , n. /pri sip"i tit, -tayt'/, v. , precipitated, precipitating, adj. , n. v.t. 1. to hasten the occurrence of; bring about prematurely, hastily, or suddenly: to precipitate an international crisis. 2. to cast down headlong; fling or hurl down. 3. to cast, plunge, or send, esp. violently or abruptly: He precipitated himself into the struggle. 4. Chem. to separate (a substance) in solid form from a solution, as by means of a reagent. v.i. 5. Meteorol. to fall to the earth's surface as a condensed form of water; to rain, snow, hail, drizzle, etc. 6. to separate from a solution as a precipitate. 7. to be cast or thrown down headlong. adj. 8. headlong: a precipitate fall down the stairs. 9. rushing headlong or rapidly onward. 10. proceeding rapidly or with great haste: a precipitate retreat. 11. exceedingly sudden or abrupt: a precipitate stop; a precipitate decision. 12. done or made without sufficient deliberation; overhasty; rash: a precipitate marriage. n. 13. Chem. a substance precipitated from a solution. 14. moisture condensed in the form of rain, snow, etc. [1520-30; (v. and adj.) < L praecipitatus (ptp. of praecipitare to cast down headlong), equiv. to praecipit- (s. of praeceps steep; see PRECIPICE) + -atus -ATE1; (n.) < NL praecipitatum a precipitate, n. use of neut. of praecipitatus] Syn. 1. accelerate. 4. crystallize. 12. reckless, impetuous. Ant. 1. retard. 12. careful. |
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