diachronous

adj

1. Varying in age from place to place
2. (alt-of, alternative)Alternative form of diachronic.

   “Results using synchronous and diachronous studies are often different and do not take into account the growth of literatures, which could affect citation counts received by a given paper.”

   “It takes an intellectual leap to reject such hierarchical constructions of prehistory and to perceive the past as a diachronous system of nonsychronous events closesly tied to ecolocial and biological phenomena.”