1. (

• synchronous ,
• synchronal ,
• synchronic ,

) 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" ;

2. (

• synchronic

) concerned with phenomena (especially language) at a particular period without considering historical antecedents; "synchronic linguistics" ;

3. (

• synchronic ,

) (of taxa) occurring in the same period of geological time ;