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A large, handsomely colored, marine univalve shell (Fasciolaria tulipa) native of the Southern United States. The name is sometimes applied also to other species of Fasciolaria.

A sea urchin when deprived of its spines; -- popularly so called from a fancied resemblance to a turban.

Any one of several large, thick, spiral marine shells belonging to Rapa and allied genera, somewhat turnip-shaped.

The turtle cowrie.

See 2d Tusk, n., 2.

To strip the shell from; to take out of the shell; to hatch.

Any fresh-water gastropod of the genus Valvata.

erous species of small marine bivalves belonging to Donax and allied genera in which the shell is wedge-shaped.

Any one of various species of marine bivalve shells belonging to the genus Avicula, in which the hinge border projects like a wing.

Any species of Vermetus.

A marine shell of the genus Turbo. See Turbo.

Hell; the bottomless pit. [Poetic] In all her gates, Abaddon rues Thy bold attempt. Milton.

A univalve mollusk of the genus Haliotis. The shell is lined with mother-of-pearl, and used for ornamental purposes; the sea-ear. Several large species are found on the coast of California, clinging closely to the rocks.

An abyss; a gulf. "The abysm of hell." Shak.

ss or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable, and, specifically, hell, or the bottomless pit. Ye powers and spirits of this nethermost abyss. Milton. The throne is darkness, in the abyss of light. Dryden.

That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca.

The herb wolfsbane, or monkshood; -- applied to any plant of the genus Aconitum (tribe Hellebore), all the species of which are poisonous.

See Acorn-shell.

h mountain range of "thunder- smitten" peaks (now Kimara), between Epirus and Macedonia. Shelley.

ductor; as, the adductor of the eye, which turns the eye toward the nose. In the bivalve shells, the muscles which close the values of the shell are called adductor muscles. Verrill.