Flōrĭānus, i, m.,
a Roman surname. Esp., M. Annius, half-brother of the emperor Tacitus , after whose death he usurped the empire , A. D. 276, but after a few weeks met an obscure death at Tarsus , Aur. Vict. Caes. 36, 37; Eutr. 9, 10; v. esp. Vop. Flor.