trĭlībris, e, adj. [ter-libra],
of three pounds weight , three-pound- : mullus, Hor. S. 2, 2, 33: paterae, scyphi, Gall. ap. Treb. Claud. 17.
trilībris e, adj.ter+libra, weighing three pounds : Mullus, H. ...
An Elementary Latin Dictionary