1. the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen; [syn: Rhizobium, genus Rhizobium]
WordNet (r) 3.0 (2006):
genus Rhizobium
n 1: the type genus of Rhizobiaceae; usually occur in the root
nodules of legumes; can fix atmospheric oxygen [syn:
Rhizobium, genus Rhizobium]