isochrone

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noun

An isoline on a map or chart connecting points that have the same value for some time-related variable.

“isochrones of urban development, isochrones of equal travel time”

Scrabble 14
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Meanings

nounisochrone (plural isochrones)

plural isochrones

  1. An isoline on a map or chart connecting points that have the same value for some time-related variable.

    isochrones of urban development, isochrones of equal travel time

    1 more example

    Isopoll maps can be reinterpreted to show the migration of a particular genus or ecotone through time by isochrones (equal time lines).

    2013, Raymond S. Bradley, Paleoclimatology: Reconstructing Climates of the Quaternary, page 420
  2. mathematicsA semicubical parabola.

Origin

See iso- and chrono-.

Full word history & related roots →
Cite this entry
APA

isochrone. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/isochrone

MLA

“isochrone.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/isochrone. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “isochrone,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/isochrone.

Source: isochrone on Wiktionary, CC BY-SA 4.0.