duckweed

[ duhk-weed ]
/ ˈdʌkˌwid /
|

noun

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. 2019

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British Dictionary definitions for duckweed

duckweed

/ (ˈdʌkˌwiːd) /

noun

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