toothshell

Century Dictionary and Cyclopedia

1. n. A small marine mollusk, Marinula pellucida, whose shell is used in Australia for necklaces. E. E. Morris, Austral English.
2. n. Any member of the genus Dentalium, family Dentaliidæ, order Solenoconchæ, or class Scaphopoda. The shells are symmetrical, tubular, conical, and generally curved. See the technical terms. Also called toothed shell.

Wiktionary

1. n. Alternative form of tooth shell.

GNU Webster's 1913

1. n. (Zoöl.) Any species of Dentalium and allied genera having a tooth-shaped shell. See dentalium.

WordNet 3.0

1. n. any of various seashore mollusks having a tapering tubular shell open at each end and a foot pointed like a spade for burrowing