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
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for duckweed
Historical Examples of duckweed
He wants a pond or a muddy brook, and plenty of duckweed to hide under.
As soon as we had plenty of duckweed and plenty of snails, we went on over the fields to the beck.
Duckweed, the popular name of several species of Lemna, nat.
Behind them was a broad ring of stagnant water covered with duckweed.
Many of the craters half-filled with water already had duckweed growing.
British Dictionary definitions for duckweed
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012