| ponceau D xylidine | <chemical> A monoazo acid dye originally employed as a red histological counterstain in Masson's trichrome stain. (05 Mar 2000) |
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| pond | <ecology> A body of standing water which is smaller than a lake, often artifically formed. (09 Oct 1997) |
| pond fracture | A circular depressed skull fracture. (05 Mar 2000) |
| ponded | <ecology> A condition in which free water covers the soil surface, for example: in a closed depression, the water is removed only by percolation, evaporation or transpiration. (09 Oct 1997) |
| ponderal index | Cube root of body weight times 100 divided by height in cm. (05 Mar 2000) |
| ponderous | 1. Very heavy; weighty; as, a ponderous shield; a ponderous load; the ponderous elephant. "The sepulcher . . . Hath oped his ponderous and marble jaws." (Shak) 2. Important; momentous; forcible. "Your more ponderous and settled project." 3. Heavy; dull; wanting; lightless or spirit; as, a ponderous style; a ponderous joke. <chemical> Ponderous spar, heavy spar, or barytes. See Barite. Origin: L. Ponderosus, from pondus, -eris, a weight: cf. F. Pondereux. See Ponder. Source: Websters Dictionary (01 Mar 1998) |
| pondfish | <zoology> Any one of numerous species of American fresh water fishes belonging to the family Centrarchidae; called also pond perch, and sunfish. The common pondfish of new England (Lepomis gibbosus) is called also bream, pumpkin seed, and sunny. See Sunfish. The long-eared pondfish (Lepomis auritus) of the Eastern United States is distinguished by its very long opercular flap. Source: Websters Dictionary (01 Mar 1998) |
| pondweed | <botany> Any aquatic plant of the genus Potamogeton, of which many species are found in ponds or slow-moving rivers. Choke pondweed, an American water weed (Anarcharis, or Elodea, Canadensis) See Anacharis. Horned pondweed, the Zannichellia palustris, a slender, branching aquatic plant, having pointed nutlets. Source: Websters Dictionary (01 Mar 1998) |
| Ponfick | Emil, German pathologist, 1844-1913. See: Ponfick's shadow. (05 Mar 2000) |
| Ponfick's shadow | A hypochromic, crescent-shaped erythrocyte, probably resulting from artifactual rupture of a red cell with loss of haemoglobin. Synonym: achromacyte, achromatocyte, ghost corpuscle, phantom corpuscle, Ponfick's shadow, shadow corpuscle, shadow, Traube's corpuscle. Origin: G. A-priv. + chroma, colour, + kytos, hollow (cell) (05 Mar 2000) |
| pongidae | A family of primates consisting of three genera: pongo (pongo pygmaeus), pan (pan troglodytes and pan paniscus), and gorilla (gorilla gorilla). They inhabit forests in southeast asia, equatorial africa, sumatra, and borneo. The members of this family are the closest living relatives of man. (12 Dec 1998) |
| pongo | <zoology> Any large ape; especially, the chimpanzee and the orang-outang. Source: Websters Dictionary (01 Mar 1998) |
| pongo pygmaeus | A single genus and species of orangutan belonging to the pongidae family and found only in lowland forests of sumatra and borneo. Among the primates, the orangutan is second in size only to the gorilla. (12 Dec 1998) |
| pono- | Bodily exertion, fatigue, overwork, pain. Origin: G. Ponos, toil, fatigue, pain (05 Mar 2000) |
| ponograph | An instrument for recording graphically the progressive fatigue of a contracting muscle. Origin: pono-+ G. Grapho, to write (05 Mar 2000) |