also: あめつぶ
noun
Refers to a single drop of rain. Often used in descriptive or poetic contexts.
窓に雨粒が当たっている。
Raindrops are hitting the window.
大きな雨粒が落ちてきた。
Large raindrops started falling.
Compound of 雨 (rain) and 粒 (grain/drop). The reading あまつぶ uses the older combining form あま for 雨.