precipitate是什麽意思

precipitate

英 [prɪ'sɪpɪteɪt] 美 [prɪ'sɪpɪtet]

1. pre- "before, forth" + cipit- + -ate.
2. 本義為：頭向前、朝前傾斜。很顯然這會造成不穩定，進而導致摔倒、摔下、墜落，由此引申為：猛然摔下，墜落，又由此引申為沉澱。以及由頭向前而表示的那種不沉穩之意，進而引申為：輕率、魯莽、急促。

precipitate 一頭栽下，沉澱，凝結，降水，降雪

pre-,在前，-cip,頭，詞源同cap,captain,-ate,使。即使頭在前，一頭栽下，後用於氣象術語，降水，降雪，引申物理術語沉澱，沉積，積灰，如Electrostatic Precipitator,電除塵器。

precipitate 魯莽的，倉促的

pre-,在前，-cip,頭，詞源同cap,captain,-ate,形容詞後綴。即使頭在前的，一頭栽下的，引申詞義魯莽的，倉促的。

precipitate (v.): "to hurl or fling down," 1520s, a back formation from precipitation or else from Latin praecipitatus, past participle of praecipitare "to throw or dive headlong," from praeceps "steep, headlong, headfirst" (see precipice). Meaning "to cause to happen, hurry the beginning of" is recorded from 1620s. Chemical sense is from 1620s; meteorological sense first attested 1863. Related: Precipitated; precipitating.
precipitate (adj.): c. 1600, from Latin praecipitatus, past participle of praecipitare "to throw or dive headlong" (see precipitate (v.)). Meaning "hasty" is attested from 1650s. Related: Precipitately.
precipitate (n.): 1560s, probably a back formation from precipitation.

1. Adding sulphate to the solution will give a precipitate.: 將硫酸鹽加入該溶液會產生沉澱.