lunule noun. ['lu:njʊl] L16.
[formed as LUNULA: see -ULE.]
1. A mark shaped like a half moon. Only in L16.

2. Geometry. = LUNE noun³ 1. M18.

3. Anatomy, Zoology, & Botany. A crescent-shaped mark, spot, etc.; spec. the pale area at the base of a fingernail. Cf. LUNULA 3. E19.

4. Conchology. The crescent-shaped depression in front of the umbo of a shell; = LUNULA 4. E19.

[TahlilGaran] English Dictionary ▲