tet·rad·ite \ˈte.trəˌdīt\noun (-s) Usage: usually capitalized Etymology: New Latin Tetradites, from Late Greek Tetraditēs, a heretic, from Greek tetrad-, tetras tetrad, four + -itēs -ite : one holding that there are four persons in God < the epithet of Tetradite has historically been applied to Nestorians and Origenists among others >