1 definition found From The Collaborative International Dictionary of English v.0.44 [gcide]: Pythagoreanism \Pyth'a*go"re*an*ism\, noun The doctrines of Pythagoras or the Pythagoreans. As a philosophic school Pythagoreanism became extinct in Greece about the middle of the 4th century [B. C.]. --Encyc. Brit.

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