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Any small crustacean parasitic on fishes. See Branchiura, and Ichthvophthira.

A genus of free-swimming macruran Crustacea, having a slender body and long appendages.

A subdivision of decapod Crustacea, having the abdomen largely developed. It includes the lobster, prawn, shrimp, and many similar forms. Cf. Decapoda.

A subclass of Crustacea, including Arthrostraca and Thoracostraca, or all those higher than the Entomostraca.

That branch of zoölogical science which relates to the crustaceans; -- called also carcinology.

The anterior pair of mouth organs of insects, crustaceaus, and related animals, whether adapted for biting or not. See Illust. of Diptera.

The muller, or crushing and grinding stone, used in grinding corn on a metate. [Mexico & Local U. S.]

A covering or incrusting with marble; a casing of marble; a variegating so as to resemble marble. [R.]

upials; furnished with a pouch for the young, as the marsupials, and also some fishes and Crustacea.

marsupials carry their young; also, a pouch for similar use in other animals, as certain Crustacea.

onvert into a mash; to reduce to a soft pulpy state by beating or pressure; to bruise; to crush; as, to mash apples in a mill, or potatoes with a pestle. Specifically (Brewing), to convert, as malt, or malt and meal, into the mash which makes wort. Mashing tub, a tub for making the mash in breweries and distilleries; -…

Produced by crushing or bruising; resembling, or consisting of, a mash.

two central ones form the incus, against which the mallei, or lateral ones, work so as to crush the food.

To grind or crush with, or as with, the teeth and prepare for swallowing and digestion; to chew; as, to masticate food.

One of the mouth appendages of Crustacea, situated next behind the maxillæ. Crabs have three pairs, but many of the lower Crustacea have but one pair of them. Called also jawfoot, and foot jaw.

The fourth joint of a typical appendage of Crustacea.

A class of Arthropoda, allied to the Crustacea. It includes the trilobites, Eurypteroidea, and Limuloidea. All are extinct except the horseshoe crabs of the last group. See Limulus.

A larval crustacean in a stage following the nauplius, and having about seven pairs of appendages.

ripe, undischarged spat of an oyster. Condensed milk. See under Condense, v. t. -- Milk crust (Med.), vesicular eczema occurring on the face and scalp of nursing infants. See Eczema. -- Milk fever. (a) (Med.) A fever which accompanies or precedes the first lactation. It is usually transitory. (b) (Vet. Surg.) A form…

A machine for grinding or commuting any substance, as grain, by rubbing and crushing it between two hard, rough, or intented surfaces; as, a gristmill, a coffee mill; a bone mill.