quadrilaterus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

quā̆drĭlătĕrus, a, um, adj. [quattuor-latus],

four-sided , quadrilateral , Front. p. 35 Goes.; Boëth. Art. Geom. p. 375, 16 (Friedl.): figura, Isid. Orig. 3, 3, 12.