duckweed Syllabification: (duck·weed)Pronunciation: /ˈdəkˌwēd/Definition of duckweed noun a tiny aquatic flowering plant that floats in large quantities on still water, often forming an apparently continuous green layer on the surface. Family Lemnaceae, in particular the genus Lemna duckweed in other Oxford dictionaries Definition of duckweed in the British & World English dictionary
