Wolffia

Từ điển WordNet v3.1 - WordNet Dictionary

noun

minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond
• Syn:
genus Wolffia
• Hypernyms:
monocot genus, liliopsid genus
• Member Holonyms:
Lemnaceae, family Lemnaceae, duckweed family
• Member Meronyms:
watermeal