quadrijugous

from The Collaborative International Dictionary of English v.0.48

Quadrijugous \Quad*rij"u*gous\, a. [L. quadrijugus of a team of
   four; quattuor four + jugum yoke.] (Bot.)
   Pinnate, with four pairs of leaflets; as, a quadrijugous
   leaf.
   [1913 Webster]