rain top; the flattened form of 雨 when it sits on top of a character

Forms

• 雨 free — standalone form of the same component

Characters that use it as a component

雪

Characters filed under it as a radical

Kangxi radical no.173 · 雨 · 8strokes — The 214 Kangxi radicals

Filed under it in a dictionary. That is a lookup convention — it does not mean it is the only part the character is built from.

雨雪