water dragon

Short definition from Wiktionary

Noun

1. 1
   Any of various agamid lizards of eastern Asia and Australasia, including the genera Physignathus, Intellagama, and Tropicagama, all of subfamily Amphibolurinae.
2. 2
   A marsh marigold (Caltha palustris)
3. 3
   The lizard's tail plant (Saururus cernuus)
4. 4
   A knucker, a lizard of English folklore.