gno·se·ol·o·gy noun orgno·si·ol·o·gy\ˌnōsēˈäləjē, -ōzē-\ (-es) Etymology: New Latin gnoseologia, from gnoseo- (from Greek gnōsis knowledge) + Latin -logia -logy : the philosophic theory of knowledge : inquiry into the basis, nature, validity, and limits of knowledge < gnoseology became coextensive with the whole of metaphysics — C.A.Hart >