decussis, is (also decus, i, a mutilated form used by the Agrimensores, p. 231, 243, and 265, ed. Goes.), m. decem-as. The number ten: ex singularibus rebus, quae μονάδες apud Graecos dicuntur perficitur decussis, Vitr. 3, 1 (cf. the art. as, no. I.).

—Hence, * decussis sexis, or in one word, decussissexis, the number sixteen, Vitr. 3, 1, 8.

— Because the Roman numeral sign for ten was X, decussis was used to denote the intersection of two lines in the form of a cross: regula figitur in primo decussis puncto, Vitr. 10, 11; Plin. 18, 34, 77, § 331. Cf. decusso and its derivatives.

— (Acc. to as, no. II.) Ten asses; as a Roman coin, a ten-as piece, Varr. L. L. 5, § 170; Lucil. ib. 9, § 81 Mull.; Stat. Silv. 4, 9, 9; Fest. p. 237, 20 Mull.