1. minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond; [syn: Wolffia, genus Wolffia]
WordNet (r) 3.0 (2006):
genus Wolffia
n 1: minute rootless aquatic herbs having globular fronds
floating on or near the water surface and bearing one
flower per frond [syn: Wolffia, genus Wolffia]