Central; basic; fundamental.Originating at or connected with a central point: as, a centric nervous disease (that is, one depending on a brain-lesion, for example, as contrasted with a peripheral disease affecting the nerves in their course).n. A circle the center of which is the same as that of the earth.In petrography, applied by Becke (1878) to rock fabrics formed by the grouping of crystals about a center, radially or concentrically.