precipitant

adj.

1. Rushing or falling headlong.
2. Acting with or marked by impulsiveness in thought or action; rash. See Usage Note at precipitate.
3. Abrupt or unexpected; sudden.

n. Chemistry
A substance that causes a precipitate to form when it is added to a solution.

[Latin praecipitāns, praecipitant-, present participle of praecipitāre, to throw headlong. See precipitate.]

precipitantly pre·cip'i·tant·ly adv.

adjective

1. Characterized by unthinking boldness and haste: brash, foolhardy, harum-scarum, hasty, headlong, hotheaded, ill-considered, impetuous, improvident, impulsive, incautious, madcap, precipitate, rash¹, reckless, slapdash, temerarious, unconsidered. See careful/careless.
2. Happening quickly and without warning: abrupt, hurried, precipitate, sudden. See fast/slow/velocity, surprise/expect.

(prĭ-sĭp'ĭ-tənt)
n.

A substance that causes a precipitate to form when it is added to a solution.

A substance that causes precipitation.

Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: an agent that causes a precipitate to form

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The adjective precipitant has one meaning:

Meaning #1: done with very great haste and without due deliberation
  Synonyms: hasty, overhasty, precipitate

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