a water lily
any of various water lilies including several represented in ancient Egyptian and Hindu art and religious symbolism: Nymphaea lotus and other species
any of a genus of widely distributed upright herbaceous plants, e.g. bird's-foot trefoil: genus Lotus
a fruit considered in Greek legend to cause indolence and dreamy contentment
[via Latin from Greek lōtos from Hebrew lōt myrrh; (sense 2) Latin genus name]