angusticlavius

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

angustĭclāvĭus, a, um, adj. [angustus-clavus],

wearing a narrow ( purple ) stripe; an epithet of a plebeian tribune, who, as a plebeian, could wear only a narrow stripe of purple on his tunic (while the tribune from the nobility had a broad stripe, v. laticlavius), Suet. Oth. 10.