Lewis Short
ămurca | ămurga (noun F) : (better than ), , , = ἀμόργη (cf. Serv. ad Verg. G. 1, 194)
* The watery part that flows out in pressing olives, the lees or dregs of oil, Cato, R. R. 91; 101; 103; Varr. R. R. 1, 64; Col. 12, 50, 5; Plin. 15, 8, 8, § 33; Verg. G. 3, 448.
Charlton T. Lewis, Charles Short, A Latin Dictionary