ˌaɪsoʊˈkrɒnəl

Definitions

1. adjective

relating to or measured by isochrones, especially in geology and geography

“The isochronal maps provided valuable insights into the region’s geological history.”

2. noun

a line or area connecting points of equal age, especially in geology and geography

“The isochronal curves on the map indicated the different stages of the earth’s formation.”