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), animals having a firm, calcareous shell, as oysters and clams, thus distinguished from crustaceous animals, whose shells are more thin and soft, and consist of several joints, or articulations, as lobsters and crabs.

, stone, etc., and their behavior under strains of various kinds, as elongation, bending, crushing, etc.

Any species of Thalaassinidæ, a family of burrowing macrurous Crustacea, having a long and soft abdomen.

An extensive division of Crustacea, having a dorsal shield or carapec

The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix.…

A kind of detonating cartridge or shell placed on a rail, and exploded when crushed under the locomotive wheels, -- used as an alarm signal.

a flat heap of moist, crushed silver ore, prepared for the patio process.

vision of arthropods comprising all those which breathe by tracheæ, as distinguished from Crustacea, which breathe by means of branchiæ.

To treat as trash, or worthless matter; hence, to spurn, humiliate, or crush. [Obs.]

To crush under the foot; to trample in contempt or hatred; to subdue. Through thy name will we tread them under that rise up against us. Ps. xliv. 5.

The gill of a crustacean in which the branchial filaments are slender and cylindrical, as in the crawfishes.

aratus, an extension of the posterior part of the crown was developed in lower molars for crushing, and a smaller corresponding part appeared in upper molars. Another large cone then arose, usually from the cingulum. In more complex forms, smaller intermediate cusps appeared.

adopted in Europe. The troy ounce is supposed to have been brought from Cairo during the crusades. In this weight the pound is divided into 12 ounces, the ounce into 20 pennyweights, and the pennyweight into 24 grains; hence, the troy ounce contains 480 grains, and the troy pound contains 5760 grains. The avoirdupois…

ore or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm.

A semicircular pie or tart made by turning one half of a circular crust over the other, inclosing the fruit or other materials.

upheaving, or the state of being upheaved; esp., an elevation of a portion of the earth's crust. Lubbock.

A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.

Behind the stomach; -- said of two lobes of the carapace of certain crustaceans.

Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda.

il; a vain attempt. Bring no more vain oblations. Isa. i. 13. Vain is the force of man To crush the pillars which the pile sustain. Dryden.