duckweed : Idioms & Phrases
common duckweed
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noun of temperate regions except eastern Asia and Australia
Lemna minor; common duckweed.
WordNet
duckweed family
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noun family of small free-floating thalloid plants
Lemnaceae; family Lemnaceae.
WordNet
great duckweed
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noun cosmopolitan except South America and New Zealand and some oceanic islands
water flaxseed; Spirodela polyrrhiza.
WordNet
lesser duckweed
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noun of temperate regions except eastern Asia and Australia
Lemna minor; common duckweed.
WordNet
star-duckweed
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noun cosmopolitan in temperate regions except North America
Lemna trisulca.