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A semitranslucent variety of opal that becomes translucent or transparent on immersion in water.

Made transparent by immersion in water.

Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming.

A white, crystalline benzene derivative, C8H10O2, obtained by the reduction of phlorone.

ed in any way, as by the sight or sound of water; rabies; canine madness. [Written also hydrophoby.]

Of or pertaining to hydrophobia; producing or caused by rabies; as, hydrophobic symptoms; the hydrophobic poison.

See Hydrophobia.

The Hydroidea.

An instrument used for the purpose of obtaining specimens of water from any desired depth, as in a river, a lake, or the ocean.

One of the flat, leaflike, protective zooids, covering other zooids of certain Siphonophora.

An aquatic plant; an alga.

The branch of botany which treats of water plants.

Dropsical, or resembling dropsy. Every lust is a kind of hydropic distemper, and the more we drink the more we shall thirst. Tillotson.

In a hydropical manner.

A species (Polygonum Hydropiper) of knotweed with acrid foliage; water pepper; smartweed.

A plane, or any of a number of planes, projecting from the hull of a submarine boat, which by being elevated or depressed cause the boat, when going ahead, to sink or rise, after the manner of an aëroplane.

Pertaining to, or depending upon, both liquid and gaseous substances; as, hydropneumatic apparatus for collecting gases over water or other liquids.

A disappearing gun carriage in which the recoil is checked by cylinders containing liquid and air, the air when compressed furnishing the power for restoring the gun to the firing position. It is used with some English and European heavy guns.

Same as Dropsy.

A machine for throwing water by hand power, as a garden engine, a fire extinguisher, etc.