I. nounDate: 1550 any of a group professing to be followers of the Greek philosopher Pythagoras II. adjectiveDate: circa 1580 of, relating to, or associated with the Greek philosopher Pythagoras, his philosophy, or the Pythagoreans

adj. & n. --adj. of or relating to the Greek philosopher Pythagoras (6th c. BC) or his philosophy, esp. regarding the transmigration of souls. --n. a follower of Pythagoras.

Pythagorean Pyth`a*go"re*an, a. [L. Pythagoreus, Gr. ?.] Of or pertaining to Pythagoras (a Greek philosopher, born about 582 b. c.), or his philosophy. The central thought of the Pythagorean philosophy is the idea of number, the recognition of the numerical and mathematical relations of things. --Encyc. Brit. Pythagorean proposition (Geom.), the theorem that the square described upon the hypothenuse of a plane right-angled triangle is equal to the sum of the squares described upon the other two sides.