water dragon n 1: North American herbaceous perennial of wet places having slender curled racemes of small white flowers [syn: {lizard's-tail}, {swamp lily}, {water dragon}, {Saururus cernuus}] 2: swamp plant of Europe and North America having bright yellow flowers resembling buttercups [syn: {marsh marigold}, {kingcup}, {meadow bright}, {May blob}, {cowslip}, {water dragon}, {Caltha palustris}]