isopleth
nounUK /ˈaɪsəplɛθ/
US /ˈaɪsəplɛθ/
A line on a map that connects places where something is the same.
The weather map used an isopleth to show all the towns with the same temperature.
RELATED WORDS
OTHER MEANINGS
2. A line on a graph connecting points that share the same value of a variable.
The engineer drew an isopleth to link points of equal pressure on the chart.
3. A line on a chart showing equal rainfall or another climate measure across a region.
The isopleth on the rainfall map circled the area that received ten inches of rain.
4. Any curve along which a given quantity stays constant.
Each isopleth on the diagram marks a constant concentration of the chemical.