nountē^trădĭumTE^TRADIVM☆ KeepMeaningthe number fourLewis & Short 1879ModernAs printed, 1879TETRADIUMLEWIS & SHORTTETRADIUMtē^trădĭum, ii, n., = τετράδιον, I. the number four, a quaternion, tetrad, Col. 3, 20, 3; Sen. Contr. 5 praef.Read the whole entry