Added 9 October 2026 waterdrop noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about waterdrop at Wordnik → Where our words come from → A single drop of water. The dropping of a large amount of water from an aircraft to combat fires. Origin From water + drop. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: dewdropraindropdropfuldripeyedropdroppingdropeavedropdrizzledewfalldrippage Back to today's word