| hydranth | <zoology> One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. Origin: Hydra + Gr. A flower. Source: Websters Dictionary (01 Mar 1998) |
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| hydrargochloride | <chemistry> A compound of the bichloride of mercury with another chloride. Origin: Hydrargyrum + chloride. Source: Websters Dictionary (01 Mar 1998) |
| hydrargyria | Hydrargyrism Synonym: mercury poisoning. Origin: L. Hydrargyrum, mercury (05 Mar 2000) |
| hydrargyrism | <medicine> A diseased condition produced by poisoning with hydrargyrum, or mercury; mercurialism. Source: Websters Dictionary (01 Mar 1998) |
| hydrargyrum | <chemistry> Quicksilver; mercury. Origin: NL, fr. L. Hydrargyrus, Gr.; water + silver. Source: Websters Dictionary (01 Mar 1998) |
| hydrarthrodial | Relating to hydrarthrosis. (05 Mar 2000) |
| hydrarthron | <medicine> An effusion of watery liquid into the cavity of a joint. Origin: NL. See Hydro-, 1, and Arthrosis. Source: Websters Dictionary (01 Mar 1998) |
| hydrarthrosis | <medicine> An effusion of watery liquid into the cavity of a joint. Origin: NL. See Hydro-, 1, and Arthrosis. Source: Websters Dictionary (01 Mar 1998) |
| hydrarthrus | <medicine> An effusion of watery liquid into the cavity of a joint. Origin: NL. See Hydro-, 1, and Arthrosis. Source: Websters Dictionary (01 Mar 1998) |
| hydrase | Former name for hydratase. (05 Mar 2000) |
| hydrastine | <chemistry> 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. Source: Websters Dictionary (01 Mar 1998) |
| hydrastinine | A semisynthetic alkaloid prepared from hydrastine; the hydrochloride has been used in uterine haemorrhage and as an oxytocic; in large doses, it is a powerful depressant of the entire motor tract (motor cortex, nerve, and muscle). (05 Mar 2000) |
| hydrastis | The dried rhizome of Hydrastis canadensis (family Ranunculaceae), a native of the eastern U.S.; formerly used in the treatment of chronic catarrhal states of the mucous membranes and in metrorrhagia. Synonym: golden seal, jaundice root, yellow root. Origin: Mod. L. Fr. G. Hydor (hydro-), water, + drao, to accomplish (05 Mar 2000) |
| hydratase | Trivial name applied, together with dehydratase, to certain hydro-lyases (EC class 4.2.1) catalyzing hydration-dehydration; e.g., fumarate-malate interconversion by fumarate hydratase. (05 Mar 2000) |
| hydrate | <chemistry> A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts. 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. Origin: Gr. "ydwr water: cf. F. Hydrate. Source: Websters Dictionary (01 Mar 1998) |