Pythagorean

pi-thag-ō-rē′an, adj. pertaining to Pythagoras ( c. 532 B.C. ), a celebrated Greek philosopher, or to his philosophy.— n. a follower of Pythagoras.— ns. Pythag′orism , Pythagorē′anism , his doctrines.— Pythagorean proposition , the 47th proposition of Euclid, Book I., said to have been discovered by Pythagoras; Pythagorean system , the astronomical system of Copernicus, erroneously attributed to Pythagoras; Pythagorean triangle , a triad of whole numbers proportional to the sides of a right-angled triangle—e.g. 3, 4, 5.