isoline
/ˈaɪsəˌlaɪn/
noun
- A line on a map or chart that connects points of equal value for a particular measurement, such as temperature, pressure, or elevation.
- Each isoline on the temperature chart represents a constant degree of heat.
- The weather map uses isolines to show areas with the same air pressure.
- Hikers use topographic maps with isolines to understand the steepness of the terrain.
Synonyms