Amurca, buius amurcæ, f. gen. Virgil, The mother or some of oyle.Amurca nigra.Virg.Amurca Palladia: Ab oliua arbore, quæ sacra est Pall adi Colum.Amutcaria dolia. Cato. Vessels to put the some in.Amusium. Vitr. An instrument vsed to cry the windes.
Lewis and Short: Latin dictionary
ămurca (better than ămurga), ae, f., = a)mo/rgh (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.