半月瓣 bànyuèbàn semilunar valve Definitions Defs Origin Strokes Stroke Words Sentences Sents 半月 bànyuè half-moon the moon in its first or last quarter when it appears as a semi-circle; also refers to a crescent shape or a meniscus瓣 bàn noun valve A valve, such as in the heart or a mechanical device, or a lamella