| pondweed | (n) any of several submerged or floating freshwater perennial aquatic weeds belonging to the family Potamogetonaceae |
| canadian pondweed | (n) North American waterweed; widely naturalized in Europe, Syn. Elodea canadensis |
| curled leaf pondweed | (n) European herb naturalized in the eastern United States and California, Syn. curly pondweed, Potamogeton crispus |
| horned pondweed | (n) found in still or slow-moving fresh or brackish water; useful to oxygenate cool water ponds and aquaria, Syn. Zannichellia palustris |
| loddon pondweed | (n) pondweed with floating leaves; of northern United States and Europe, Syn. Potamogeton americanus, Potamogeton nodosus |
| variously-leaved pondweed | (n) of Europe (except the Mediterranean area) and the northern United States, Syn. Potamogeton gramineous |
| elodea | (n) submerged freshwater perennials, Syn. ditchmoss, pondweed, genus Elodea |
| potamogetonaceae | (n) plants that grow in ponds and slow streams; sometimes includes family Zosteraceae, Syn. pondweed family, family Potamogetonaceae |
| Pondweed | n. (Bot.) Any aquatic plant of the genus
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| Laichkraut { n } [ bot. ] | pondweed [Add to Longdo] |