| pond | <ecology> A body of standing water which is smaller than a lake, often artifically formed. (09 Oct 1997) |
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| 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) |
| algal oxidation pond | <ecology> A wide, shallow pond used in waste water treatment, the algae produce oxygen so that bacteria can aerobically digest sewage in the water. (09 Oct 1997) |
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| oxidation pond | A pond that contains partially treated wastewater which is then left to allow the growth of algae and bacteria which decompose therest of the waste. (09 Oct 1997) |