Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun great_duckweed

1 sense of great duckweed

Sense 1
great duckweed, water flaxseed, Spirodela polyrrhiza -- (cosmopolitan except South America and New Zealand and some oceanic islands)
       => duckweed -- (any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds)