a. rare. [f. L. vīcēsim-us twentieth, f. vīcēnī: see VICENARY.] = VIGESIMAL a. Also † Vicesim. Obs.–0
1656. Blount, Glossogr., Vicesimal, Vicesim, the same with Vicenarious.
1902. Daily Chron., 11 Jan., 5/2. Our system has inherent advantages for conversion over the former vicesimal and duodecimal system of France.
