Lunule :: Lunule (n.) 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..
Lunulet :: Lunulet (n.) A small spot, shaped like a half-moon or crescent; as, the lunulet on the wings of many insects..
Lunulite :: Lunulite (n.) Any bryozoan of the genus Lunulites, having a more or less circular form..