lunula

A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.

In entomology, a small depression on the frons of a dipterous insect.

Something which is shaped like a little moon or narrow crescent; a lunule or lunulet.

Specifically— The free crescentic edge and adjoining thin part of a semilunar valve of the heart.

The small white semilunar mark at the base of the human fingernails.

A crescentic impression on some bivalve shells; a lunule.

A small semicircular or crescentic spot of color; a lunulet.

[capitalized] A generic name given by Hitchcock to ichnolites of uncertain character.

In mathematics, a lune.

Same as lunule.