Source : WordNet®

synchronic
     adj 1: occurring or existing at the same time or having the same
            period or phase; "recovery was synchronous with
            therapy"- Jour.A.M.A.; "a synchronous set of clocks";
            "the synchronous action of a bird's wings in flight";
            "synchronous oscillations" [syn: {synchronous}, {synchronal}]
            [ant: {asynchronous}]
     2: concerned with phenomena (especially language) at a
        particular period without considering historical
        antecedents; "synchronic linguistics"; "descriptive
        linguistics" [syn: {descriptive}] [ant: {diachronic}]
     3: (of taxa) occurring in the same period of geological time