What is another word for isochrone?
Pronunciation: [ˈa͡ɪsəkɹˌə͡ʊn] (IPA) 
Isochrone refers to a line connecting points that have equal travel time. Synonyms for isochrone include isochron, equitime, equipotential, and travel-time contour. Equitime, like isochrone, refers to a line that connects all points that are equidistant in terms of travel time. Equipotential describes a region where the travel time is the same throughout. Travel-time contour is a line drawing that has the same travel time, showing the points of maximum reach within that period. In essence, isochrones synonyms are words that describe the same concept as the time travel division at any given point.
