Dictionary.net

• common water lily of eastern and central North America, having broad leaves and globe-shaped yellow flowers; in sluggish fresh or slightly brackish water

2006 - WordNet 3.0
By Princeton University

• common water lily of eastern and central North America, having broad leaves and globe-shaped yellow flowers; in sluggish fresh or slightly brackish water

2011 - English Dictionary Database
By DataStellar Co., Ltd