WordWeb Online

1. (of taxa) occurring in the same period of geological time
    
2. Occurring or existing at the same time or having the same period or phase
   "recovery was synchronic with therapy";
   - synchronous, synchronal
    
3. (language) concerned with phenomena (especially language) at a particular period without considering historical antecedents
   "synchronic linguistics"

See also: coetaneous, coeval, coexistent, coexisting, coincident, coincidental, coinciding, concurrent, contemporaneous, contemporary, co-occurrent, cooccurring, parallel, simultaneous, synchronised [Brit], synchronized

Antonym: historical

Encyclopedia: Synchronic