Lewis Short
quindĕcim-prīmi, ōrum
* The board of fifteen chief magistrates in the municipia, in MSS. abbrev. XV. primi: evocat ad se Caesar Massiliensium XV. primos,Caes. B. C. 1, 35, 1; so perh. also Inscr. Murat. 626, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary