- any plant of the family Lemnaceae, especially of the genus Lemna, comprising small aquatic plants that float free on still water.
Origin of duckweed
1400–50; late Middle English dockewede; so called because eaten by ducks
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for duckweed
As soon as we had plenty of duckweed and plenty of snails, we went on over the fields to the beck.
He wants a pond or a muddy brook, and plenty of duckweed to hide under.
Duckweed, the popular name of several species of Lemna, nat.The New Gresham Encyclopedia
Behind them was a broad ring of stagnant water covered with duckweed.Combed Out
Fritz August Voigt
Many of the craters half-filled with water already had duckweed growing.Fanny Goes to War
- 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