bĭpennĭfer, fĕra, fĕrum, adj. [2. bipennis-fero],
bearing a two-edged axe (only in Ov.): Lycurgus, Ov. M. 4, 22; id. Tr. 5, 3, 39: Arcas, id. M. 8, 391.
bipennifer era, erum, adj.bipennis + 1 FER-, bearing a two-edged axe : Lycurgus, O. ...
An Elementary Latin Dictionary