duckweed

noun

SayDUK-weed/ˈdʌkˌwid/

Pluralduckweeds, duckweed

1 meaning of duckweed

1
nouncountable or uncountable
A tiny green plant that floats in groups on top of ponds and other still water.
Like a thin green carpet floating on top of the water.
A thick mat of duckweed covered the whole surface of the pond.
The ducks nibbled at the duckweed drifting near the bank.
Similarduckmeat, ducksmeat
Note

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Origin

From "duck" plus "weed," because ducks and other water birds often eat it.