The Collaborative International Dictionary
Unijugate
Unijugate \U*nij"u*gate\, a. [Uni- + L. jugum yoke, pair: cf. L. unijugus having one yoke.] (Bot.) Having but one pair of leaflets; -- said of a pinnate leaf.
Wiktionary
unijugate
a. (context botany of a pinnate leaf English) Having only one pair of leaflets.