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Exhausted of moisture; parched with heat; dry; barren. "An arid waste." Thomson.

The state or quality of being arid or without moisture; dryness.

Aridity; dryness.

One of a group of arachnids, including the mites and ticks.

A parasitic nematoid worm, espec. the roundworm, Ascaris lumbricoides, often occurring in the human intestine and allied species found in domestic animals; also commonly applied to the pinworm (Oxyuris), often troublesome to children and aged persons.

Of or pertaining to cantharides or made of cantharides; as, cantharidal plaster.

See cantharis.

The active principe of the cantharis, or Spanish fly, a volatile, acrid, bitter solid, crystallizing in four-sided prisms.

Having an odd number of fingers or toes, either one, three, or five, as in the horse, tapir, rhinoceros, etc.

A more extensive group of acalephs, including both the true lucernarida and the Discophora.

sable into simpler sugars by hydrolysis. Specif., as used by some, a hexose. The monosaccharides are all open-chain compounds containing hydroxyl groups and either an aldehyde group or a ketone group.

The modern, or true, Crustacea, as distinguished from the Merostomata.

Same as Merostomata. [Written also Palæocarida.]

Same as Artiodactyla.

Having an evennumber of digits on the hands or the feet. Qwen.

A division of Turbellaria; the Dendrocoela.

One of an extinct family of cryptagamous trees, including the genus Sigillaria and its allies.

Any one of numerous species of limpet-shaped pulmonate gastropods of the genus Siphonaria. They cling to rocks between high and low water marks and have both lunglike organs and gills. -- Si`pho*na"rid, a.

A complex sugar, as raffinose, yielding by hydrolysis three simple sugar molecules.

An extensive division of Hydroidea; the tubularians; -- called also Athecata, Gymnoblastea, and Tubulariæ.