[a. L. vīgintī twenty], a first element employed in a few combs. in the sense ‘having or consisting of twenty (things),’ as Vigintiangular a. [L. viginti-angulus], having twenty angles. Also † Vigintiquintuple Math., the result of multiplying by twenty-five.
1690. Leybourn, Curs. Math., 349. If any Root be multiplied by … 5 the Product shall be the Root of the … Vigintiquintuple … of the Squares of the Multipliers.
1822. T. Taylor, Apuleius, 329, note. He calls … the other [body] vigintiangular.
