What is "harp shell"

Harp \Harp\ (h[aum]rp), n. [OE. harpe, AS. hearpe; akin to D. harp, G. harfe, OHG. harpha, Dan. harpe, Icel. & Sw. harpa.]

1. A musical instrument consisting of a triangular frame furnished with strings and sometimes with pedals, held upright, and played with the fingers.

2. (Astron.) A constellation; Lyra, or the Lyre.

3. A grain sieve. [Scot.]

   [AE]olian harp. See under [AE]olian.

   Harp seal (Zo["o]l.), an arctic seal ( Phoca Gr[oe]nlandica). The adult males have a light-colored body, with a harp-shaped mark of black on each side, and the face and throat black. Called also saddler, and saddleback. The immature ones are called bluesides; their fur is white, and they are killed and skinned to harvest the fur.

   Harp shell (Zo["o]l.), a beautiful marine gastropod shell of the genus Harpa, of several species, found in tropical seas. See Harpa.

n. An attractive marine gastropod shell of the genus ''Harpa'', found in tropical seas.