| OCH | oral contraceptive hormone |
|---|---|
| OCM | oral contraceptive medication |
| OCS | occipital condyle syndrome; Ondine's curse syndrome; open canalicular system; oral contraceptive ste... |
| OCT | object classification test; optimal cutting temperature; oral contraceptive therapy; ornithine carba... |
| OES | oral esophageal stethoscope; optical emission spectroscopy |
| water chestnut | <botany> The fruit of Trapa natans and Trapa bicornis, Old World water plants bearing edible nutlike fruits armed with several hard and sharp points; also, the plant itself. Synonym: water caltrop. Source: Websters Dictionary (01 Mar 1998) |
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| water chevrotain | <zoology> A large West African chevrotain (Hyaemoschus aquaticus). It has a larger body and shorter legs than the other allied species. Synonym: water deerlet. Source: Websters Dictionary (01 Mar 1998) |
| water chicken | <zoology> The common American gallinule. Source: Websters Dictionary (01 Mar 1998) |
| water chickweed | <botany> A small annual plant (Montia fontana) growing in wet places in southern regions. Source: Websters Dictionary (01 Mar 1998) |
| water chinquapin | <botany> The American lotus, and its edible seeds, which somewhat resemble chinquapins. Cf. Yoncopin. Source: Websters Dictionary (01 Mar 1998) |
| water-clear cell of parathyroid | A variety of chief cell, so-called because the cytoplasm contains much glycogen that is not preserved or stained in the usual preparation. Synonym: wasserhelle cell. (05 Mar 2000) |
| water cock | <zoology> A large gallinule (Gallicrex cristatus) native of Australia, India, and the East Indies. In the breeding season the male is black and has a fleshy red caruncle, or horn, on the top of its head. Synonym: kora. Source: Websters Dictionary (01 Mar 1998) |
| water-cooled vibrating grate | A boiler grate made up of a tuyere grate surface mounted on a grid of water tubes interconnected with the boiler circulation system for positive cooling. The structure is supported by flexing plates allowing the grid and grate to move in a vibrating action. Ashes are automatically discharged. (05 Dec 1998) |
| water crake | <zoology> The dipper. The spotted crake (Porzana maruetta). The swamp hen, or crake, of Australia. Source: Websters Dictionary (01 Mar 1998) |
| water cress | <botany> A perennial cruciferous herb (Nasturtium officinale) growing usually in clear running or spring water. The leaves are pungent, and used for salad and as an antiscorbutic. Source: Websters Dictionary (01 Mar 1998) |
| water crow | <zoology> The dipper. The European coot. Origin: So called in allusion to its dark plumage. Source: Websters Dictionary (01 Mar 1998) |
| water crowfoot | <botany> An aquatic kind of buttercup (Ranunculus aquatilis), used as food for cattle in parts of England. Great water crowfoot, an American water plant (Ranunculus multifidus), having deep yellow flowers. Source: Websters Dictionary (01 Mar 1998) |
| water cure | 1. <medicine> Hydropathy. 2. A hydropathic institution. Source: Websters Dictionary (01 Mar 1998) |
| water deer | <zoology> A small Chinese deer (Hydropotes inermis). Both sexes are destitute of antlers, but the male has large, descending canine tusks. The water chevrotain. Source: Websters Dictionary (01 Mar 1998) |
| water deprivation | The withholding of water in a structured experimental situation. (12 Dec 1998) |