precipitation

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about precipitation at Wordnik → Where our words come from →

1. The quantity of water falling to earth at a specific place within a specified period of time.

   the storm brought several inches of precipitation

2. The process of forming a chemical precipitate.
3. The falling to earth of any form of water (rain or snow or hail or sleet or mist).