précipitation

Etymology
From.

Noun

 * 1) precipitation, unwise or rash rapidity; sudden haste
 * 2)  precipitation, a reaction that leads to the formation of a heavier solid in a lighter liquid; the precipitate so formed at the bottom of the container
 * 3)  precipitation any or all of the forms of water particles, whether liquid or solid, that fall from the atmosphere (e.g., rain, hail, snow or sleet)