D defs.my
Entry 1 sense Webster, 1913

Duckweed

/dŭk'-wēdˌ/ · Duck·weed · IPA /ˈdʌkˌwid/
01 n. A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food…
  1. 1.
    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.(Bot.) Also: duckmeat