What is "biforine"

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.

n. (context botany English) An oval sac or cell, found in the leaf of certain araceous plants, with an opening at each end through which raphides, generated inside, are discharged.