isochron
/ˈaɪsəkrɑn/
noun
- A line on a map or chart connecting points where a particular event or phenomenon occurs at the same time, or where travel time from a starting point is equal.
- Urban planners use isochrons to visualize how far you can travel from a city center in 30 minutes by public transit.
- The geologist drew an isochron to mark places where the volcanic ash layer was deposited at the same moment.
- The weather map showed isochrons for the arrival of the cold front across the state.
adjective
- Having equal duration or occurring at regular intervals of time.
- The pendulum's swing is nearly isochron, meaning each back-and-forth takes the same amount of time.
- In an isochron rhythm, every beat is spaced exactly one second apart.
- The ancient water clock was designed to be isochron, dripping at a constant rate.