Palmárius, Adiectiuum. That is anhand breadth in measure. vt Palmarium spatium. Colum. The space of an handbreath.
Lewis and Short: Latin dictionary
palmāris, e, adj. [1. palma]. I.A hand's-breadth, or palm, in length, width, etc.: virgulae, Varr. R. R. 1, 35: spatia, Col. 8, 3; 11, 3: scrobes, Pall. 3, 24: palmarem in minutiem contrahi, Arn. 6, 204.— II.Of palms, full of palms, palm-: lucus, Amm. 24, 4, 7.—B.Trop., that merits the palm or prize, excellent (class.): statua, Cic. Phil. 6, 5, 15: sententia, id. N. D. 1, 8, 20: dea, the goddess of victory, because she is represented with a palm-branch, App. M. 2, p. 116, 2.
palmārĭus, a, um, adj. [id.], of or belonging to palms: Insula Palmaria, the Isle of Palms in the Tyrrhenian Sea, now Palmarola, Varr. R. R. 3, 5, 7; Plin. 3, 6, 12, 81.—II.Transf., subst.: palmārĭ-um, ii, n.A.That which deserves the prize, a masterpiece: id vero est, quod ego mihi puto palmarium, Ter. Eun. 5, 4, 8.— B.The fee of a successful advocate, Dig. 50, 13, 1, 12; cf. palmarium, a)cio/nikon, Gloss. Philox.