You searched for: “isochrone
isochrone (s) (noun), isochrones (pl)
A line on a chart connecting all points having the same time of occurrence of particular phenomena or of a particular value of a quantity: An isochrone on the map linked the towns and cities from which it would take exactly the same time for Mary and Dick to travel to their destination.
This entry is located in the following units: chrono-, chron- (page 8) iso-, is- (page 2)