Lewis Short
(adjective) : mustus, a, um
* Adj., young, new, fresh (as only ante-class.): agna, Cato ap. Prisc. 711 P.: vinum,id. R. R. 115.
* Subst.: mustum, i, n., new or unfermented wine, must, Cato, R. R. 120: dulce,Verg. G. 1, 295: novum,Plin. Ep. 9, 16, 2: linire victuro dolia musto,Juv. 9, 58.—Plur., of the different kinds of must, Plin. 14, 20, 25, § 125 al.—Poet. in plur.: musta, ōrum, vintages, i. e. autumns: tercentum musta videre,Ov. M. 14, 146.—Trop.: quasi de musto ac lacu fervidam orationem fugiendam,Cic. Brut. 83, 288.
* Transf., of oil: olei musta, new oil (al. olei, quam musta), Plin. 15, 1, 2, § 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary