How did duckweed gets its name?

The name "duckweed" comes from the fact that ducks and other waterfowl often feed on it. The word "duckweed" is derived from the Old English words "duca" (meaning "to dive" or "to duck") and "wede" (meaning "plant"). This refers to the plant's habit of growing on the surface of water, where it can easily be reached by ducks and other birds.