Py·thag·o·ras 
(pĭ-thăgər-əs) fl. sixth century BC.
(pĭ-thăgər-əs) fl. sixth century BC. Greek philosopher who founded a school in southern Italy that sought to discover the mathematical principles of reality through the study of musical harmony and geometry. The Pythagorean theorem is ascribed to him.
- intertextually
- intertexture
- intertidal
- intertidally
- intertitle
- intertribal
- intertropical
- intertropical convergence zone
- intertwine
- intertwinement
- intertwist
- interurban
- interval
- intervale
- intervalic
- intervallic
- intervene
- intervener
- intervenor
- intervention
- interventional
- interventionism
- interventionist
- intervertebral
- intervertebral disc