a. [ L. bifarius; bis twice + fari to speak. Cf. Gr. &unr_; twofold; &unr_; twice + &unr_; to say. ] 1. Twofold; arranged in two rows. [ 1913 Webster ]
2. (Bot.) Pointing two ways, as leaves that grow only on opposite sides of a branch; in two vertical rows. [ 1913 Webster ]