isochrone

American  

[ahy-suh-krohn] / ˈaɪ səˌkroʊn /

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.

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isochrone British  

/ 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

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Etymology

Origin of isochrone

1690–1700; back formation from isochronous or isochronal

Example Sentences

The world is an isochrone map, where distances are only as great as the time they take you to cross.

From Slate

Think of an isochrone map, where bands of color denote travel time from a central location, adapted to correspond to France’s thriving cities: Paris, Lyon, Bordeaux, and a handful of others.

From Slate