1. minute aquatic herbs floating on the water surface consisting of a shiny leaflike frond and 2-21 roots; [syn: Spirodela, genus Spirodela]
WordNet (r) 3.0 (2006):
Spirodela
n 1: minute aquatic herbs floating on the water surface
consisting of a shiny leaflike frond and 2-21 roots [syn:
Spirodela, genus Spirodela]