riv·er·weed 
(rĭvər-wēd′)
(rĭvər-wēd′)n.
Any of various aquatic plants of the family Podostemaceae, especially P. ceratophyllum of North America, which grows on rocks in rapidly flowing streams.
| 单词 | riverweed |
| 释义 | riv·er·weed (rĭvər-wēd′)n. Any of various aquatic plants of the family Podostemaceae, especially P. ceratophyllum of North America, which grows on rocks in rapidly flowing streams. |
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