precipitant

nouns

an agent that causes a precipitate to form
is derived from
is a type of (narrower)
a substance that exerts some force or effect

adjectives

done with very great haste and without due deliberation
"hasty marriage seldom proveth well"- Shakespeare; "hasty makeshifts take the place of planning"- Arthur Geddes; "rejected what was regarded as an overhasty plan for reconversion"; "wondered whether they had been rather precipitate in deposing the king"
is derived from
is derived from
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