The seven liberal arts comprised two groups of studies: the trivium and the quadrivium. Studies in the trivium involved grammar, dialectic (logic), and rhetoric; and studies in the quadrivium involved arithmetic, music, geometry, and astronomy. The term liberal in liberal arts is from the Latin word liberalis, meaning "appropriate for free men" (social and political elites), and they were contrasted with the servile arts. The liberal arts thus initially represented the kinds of skills and general knowledge needed by the elite echelon of society, whereas the servile arts represented specialized tradesman skills and knowledge needed by persons who were employed by the elite. The seven liberal arts are part of the instruction of the Fellow Craft Degree.