duckweed Meaning, Definition & Usage

  1. noun any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds

WordNet

Duck"weed` noun
Definitions
  1. (Bot.) A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks; -- called also duckmeat.

Webster 1913