kanji 'door' radical
Refers to the kanji radical 戸 (⾨), often called とだれ or とかんむり when it appears at the top of a character. Used in describing kanji structure.
See also: 戸冠
The radical of 所 is the 'door' radical.
Compound of 戸 (door) and 垂れ (hanging), referring to the shape of the radical.