Lunule
Pronunciation : Lu"nule
Part of Speech : n.
Etymology : [F., fr. L. lunula, dim. of luna moon.]
Definition : 1. (Anat.)
Defn: Anything crescent-shaped; a crescent-shaped part or mark; a lunula, a lune.
2. (Chem.)
Defn: A lune. See Lune.
3. (Zo?l.) (a) A small or narrow crescent. (b) A special area in front of the beak of many bivalve shells. It sometimes has the shape of a double crescent, but is oftener heart- shaped. See Illust. of Bivalve.
Source : Webster's Unabridged Dictionary, 1913