isochrone

[ ahy-suh-krohn ]

noun

1. a line, as on a map, connecting all points having some property simultaneously, as in having the same delay in receiving a radio signal from a given source or requiring the same time to be reached by available transportation from a given center.

isochrone

/ ˈaɪsəʊˌkrəʊn /

noun

1. a line on a map or diagram connecting places from which it takes the same time to travel to a certain point

Word History and Origins

Origin of isochrone¹

1690–1700; back formation from isochronous or isochronal