nounrectĭangŭlumRECTIANGVLVM☆ KeepMeaninga right-angled triangleLewis & Short 1879ModernAs printed, 1879RECTIANGULUMLEWIS & SHORTRECTIANGULUMrectĭangŭlum, i, n. rectus-angulus, I. a right-angled triangle, Isid. 3, 12, 2.Read the whole entry