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- English Word Hydra Definition Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.
- English Word Hydra Definition Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker.
- English Word Hydra Definition A southern constellation of great length lying southerly from Cancer, Leo, and Virgo.
- English Word Hydra-tainted Definition Dipped in the gall of the fabulous hydra; poisonous; deadly.
- English Word Hydrachnid Definition An aquatic mite of the genus Hydrachna. The hydrachnids, while young, are parasitic on fresh-water mussels.
- English Word Hydracid Definition An acid containing hydrogen; -- sometimes applied to distinguish acids like hydrochloric, hydrofluoric, and the like, which contain no oxygen, from the oxygen acids or oxacids. See Acid.
- English Word Hydracrylic Definition Pertaining to, or designating, an isomeric variety of lastic acid that breaks down into acrylic acid and water.
- English Word Hydractinian Definition Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata.
- English Word Hydrae Definition of Hydra
- English Word Hydraemia Definition An abnormally watery state of the blood; anaemia.
- English Word Hydragogue Definition Causing a discharge of water; expelling serum effused into any part of the body, as in dropsy.
- English Word Hydragogue Definition A hydragogue medicine, usually a cathartic or diuretic.
- English Word Hydramide Definition One of a group of crystalline bodies produced by the action of ammonia on certain aldehydes.
- English Word Hydramine Definition One of a series of artificial, organic bases, usually produced as thick viscous liquids by the action of ammonia on ethylene oxide. They have the properties both of alcohol and amines.
- English Word Hydrangea Definition A genus of shrubby plants bearing opposite leaves and large heads of showy flowers, white, or of various colors. H. hortensis, the common garden species, is a native of China or Japan.
- English Word Hydrant Definition A discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks; a water plug.
- English Word Hydranth Definition One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. See Illust. of Hydroidea.
- English Word Hydrargochloride Definition A compound of the bichloride of mercury with another chloride.
- English Word Hydrargyrate Definition Of or pertaining to mercury; containing, or impregnated with, mercury.
- English Word Hydrargyrism Definition A diseased condition produced by poisoning with hydrargyrum, or mercury; mercurialism.
- English Word Hydrargyrum Definition Quicksilver; mercury.
- English Word Hydrarthrosis Definition An effusion of watery liquid into the cavity of a joint.
- English Word Hydras Definition of Hydra
- English Word Hydrastine Definition An alkaloid, found in the rootstock of the golden seal (Hydrastis Canadensis), and extracted as a bitter, white, crystalline substance. It is used as a tonic and febrifuge.
- English Word Hydrate Definition A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts.
- English Word Hydrate Definition A substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime.
- English Word Hydrate Definition To form into a hydrate; to combine with water.
- English Word Hydrated Definition of Hydrate
- English Word Hydrated Definition Formed into a hydrate; combined with water.
- English Word Hydrating Definition of Hydrate