Precipitantly

pre·cip·i·tant  (pr-sp-tnt)

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.

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[Latin praecipitns, praecipitant-, present participle of praecipitre, to throw headlong; see precipitate.]

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pre·cipi·tant·ly adv.