Webster’s Revised Unabridged Dictionary · 1913
Bigeminate
Bi·gem′i·nate (bī·jĕm′ĭ·nāt), a. [Pref. bi- + geminate.] (Bot.) Having a forked petiole, and a pair of leaflets at the end of each division; biconjugate; twice paired; — said of a decompound leaf.