isotherm
🇺🇸
/ˈaɪsəθɜːrm/
🇬🇧
/ˈaɪsəθɜːm/
A line on a map that connects places with the same temperature.
The weather forecast showed an isotherm at 20 degrees Celsius across the region.
天氣預報顯示該地區有一条20度的等溫線。