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单词 duckweed
释义

WordReference Random House Unabridged Dictionary of American English © 2024
duck•weed  (dukwēd′),USA pronunciation n. 
  1. Plant Biologyany plant of the family Lemnaceae, esp. of the genus Lemna, comprising small aquatic plants that float free on still water.
  • 1400–50; late Middle English dockewede; so called because eaten by ducks

Collins Concise English Dictionary © HarperCollins Publishers::
duckweed /ˈdʌkˌwiːd/ n
  1. any of various small stemless aquatic plants of the family Lemnaceae, esp any of the genus Lemna, that have rounded leaves and occur floating on still water in temperate regions
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