1. A line on a map or chart connecting points of equal temperature at a given time or averaged over a given period.
Usage: Plural form of isotherm; Commonly used in meteorology and climatology

Examples

• The weather map showed isotherms indicating a cold front moving eastward.
• Meteorologists use isotherms to visualize temperature patterns across regions.
• The isotherms on the climate map revealed that coastal areas remained warmer than inland regions.
• By studying isotherms, scientists can better understand seasonal temperature variations.
• The isotherms shifted northward as summer approached, reflecting warming temperatures.