1. To cause a substance in solution to separate as a solid. 2. A solid separated out from a solution or suspension; a floc or clump, such as that resulting from the mixture of a specific antigen and its antibody. 3. Accumulation of inflammatory cells on the corneal endothelium in uveitis (keratic precipitates). [L. praecipito, pp. -atus, to cast headlong]
- keratic precipitates inflammatory cells on the corneal endothelium. SYN: punctate keratitis, keratitis punctata.
- mutton-fat keratic precipitates coalescent precipitates forming small plaques that gradually become more translucent.
- pigmented keratic precipitates precipitates that occur in eyes with brown irides or after prolonged inflammation.
- red p. SYN: mercuric oxide, red.
- sweet p. SYN: calomel.
- white mercuric p. SYN: ammoniated mercury.
- yellow p. SYN: mercuric oxide, yellow.

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pre·cip·i·tate pri-'sip-ə-.tāt vb, -tat·ed; -tat·ing vt
1) to bring about esp. abruptly
2 a) to cause to separate from solution or suspension
b) to cause (vapor) to condense and fall or deposit vi
1) to fall or come suddenly into some condition
2) to separate from solution or suspension
pre·cip·i·tate pri-'sip-ət-ət, -ə-.tāt n a substance separated from a solution or suspension by chemical or physical change usu. as an insoluble amorphous or crystalline solid

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pre·cip·i·tate (pre-sipґĭ-tāt) [L. praecipitare to cast down] 1. to cause a substance in solution to settle down in solid particles. 2. a deposit made or substance thrown down by precipitation. 3. occurring with undue rapidity, as precipitate labor. 4. in immunology, the product of interaction between soluble macromolecular antigen and the homologous antibody, e.g., the antigen-antibody complex formed as a consequence of the reaction of pneumococcus capsular polysaccharide in solution with specific antiserum.

Medical dictionary. 2011.


Look at other dictionaries:

  • Precipitate EP — EP Interpol …   Википедия

  • Precipitate — Pre*cip i*tate, n. [NL. praecipitatum: cf. F. pr[ e]cipit[ e].] (Chem.) An insoluble substance separated from a solution in a concrete state by the action of some reagent added to the solution, or of some force, such as heat or cold. The… …   The Collaborative International Dictionary of English

  • Precipitate — Pre*cip i*tate, a. [L. praecipitatus, p. p. of praecipitare to precipitate, fr. praeceps headlong. See {Precipice}.] 1. Overhasty; rash; as, the king was too precipitate in declaring war. Clarendon. [1913 Webster] 2. Lacking due deliberation or… …   The Collaborative International Dictionary of English

  • precipitate — precipitate, precipitous 1. The two words overlap in meaning and were used interchangeably from the 17c to the 19c. Precipitous has a physical meaning ‘sheer like a precipice’: • There was a precipitous wooden stair to the ground floor A. Craig,… …   Modern English usage

  • Precipitate — Pre*cip i*tate, v. t. [imp. & p. p. {Precipitated}; p. pr. & vb. n. {Precipitating}.] 1. To throw headlong; to cast down from a precipice or height. [1913 Webster] She and her horse had been precipitated to the pebbled region of the river. W.… …   The Collaborative International Dictionary of English

  • precipitate — adj Precipitate, headlong, abrupt, impetuous, hasty, sudden as applied to persons or their acts or be havior denote characterized by excessive haste and unexpectedness. Precipitate especially stresses lack of due deliberation; sometimes it… …   New Dictionary of Synonyms

  • Precipitate — Pre*cip i*tate, v. i. 1. To dash or fall headlong. [R.] [1913 Webster] So many fathom down precipitating. Shak. [1913 Webster] 2. To hasten without preparation. [R.] [1913 Webster] 3. (Chem.) To separate from a solution as a precipitate. See… …   The Collaborative International Dictionary of English

  • precipitate — [v] hurry, speed accelerate, advance, bring on, cast, discharge, dispatch, expedite, fling, further, hasten, hurl, launch, let fly, press, push forward, quicken, send forth, speed up, throw, trigger; concepts 152,242,704 Ant. check, slow, wait… …   New thesaurus

  • precipitate — [prē sip′ə tāt΄, prisip′ə tāt΄; ] for adj. [ & ] n. [, prē sip′ə tit, pri sip′ətit, prē sip′ ə tāt΄, pri sip′ətāt΄] vt. precipitated, precipitating [< L praecipitatus, pp. of praecipitare < praeceps: see PRECIPICE] 1. to throw headlong;… …   English World dictionary

  • precipitate# — precipitate vb *speed, accelerate, quicken, hasten, hurry Analogous words: drive, impel (see MOVE vb): *force, compel, coerce, constrain precipitate n *deposit, sediment, dregs, lees, grounds …   New Dictionary of Synonyms

  • precipitate — I adjective abrupt, breakneck, foolhardy, harebrained, hasty, headlong, headstrong, heady, hellbent, hot headed, hurried, immediate, impetuous, imprudent, impulsive, inconsultus, indiscreet, injudicious, madcap, overconfident, overly hasty,… …   Law dictionary

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