Pastillus, huius pastilli. A round peece of dough or any other thing like a little loafe. Medici vocant Trochiscum. Pastilli medicis sunt, Idem. Plin. Medicines made in little round balles.Pastilli apud chirurgos. Idem. Cell. Pastilli medicinales, & Pastilli odoratorij. Horat. Pomanders or other like sweete balles: washing balles.Pastillicare. Plin. To make in forme of little round balles.
Lewis and Short: Latin dictionary
pastillus, i, m.dim. [panis], a little loaf or roll: pastillus forma panis parvi utique deminutivum est a pane, Paul. ex Fest. p. 222 Müll.—II.Transf., medicine in the form of a round ball or cake, a lozenge, troche, trochisch, Plin. 22, 12, 14, 29: emplastra pastillique, quos troxi/skous Graeci vocant, Cels. 5, 17, 2; cf. id. 5, 20: sucum in sole coctum dividunt in pastillos, Plin. 13, 22, 43, 126: digerere aliquid in pastillos, id. 12, 27, 60, 131: in pastillos cogere, id. 20, 1, 2, 3: densare in, id. 25, 13, 95, 152: diluere in, id. 25, 12, 91. 143.—Also of aromatic lozenges, used to impart an agreeable smell to the breath: pastillos Rufillus olet, Hor. S. 1. 2, 27; 1, 4, 92; Mart. 1, 88, 2.