prīmipīlus ī, m
primus+2 pilus, the first centurion of the triarii : alquem ad primipilum traducere, promote to be , etc., Cs.
prīmĭpīlus or prīmōpīlus, i, v. 2. pilus. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.