Source : Webster's Revised Unabridged Dictionary (1913)

Biforine \Bif"o*rine\, n. [L. biforis, biforus, having two
   doors; bis twice + foris door.] (Bot.)
   An oval sac or cell, found in the leaves of certain plants of
   the order {Arace[ae]}. It has an opening at each end through
   which raphides, generated inside, are discharged.