1. a line on a map or chart connecting points of equal or constant value of some quantity, such as temperature or pressure, measured at the same time.
Usage: technical; used in meteorology, physics, and cartography

Examples

• Meteorologists use isochors to display regions of equal temperature across a weather map.
• The isochor on the pressure chart helped forecasters identify the location of the high-pressure system.
• By drawing isochors at regular intervals, scientists can visualize how a physical quantity varies across a geographic area.
• The isochor pattern revealed that coastal regions maintained more stable temperatures than inland areas.