Main Entry: iso·ther·mal

Pronunciation: \ˌī-sə-ˈthər-məl\

Function: adjective

Etymology: French isotherme, from is- + -therme (from Greek thermos hot) — more at therm

Date: 1826

1 : of, relating to, or marked by equality of temperature
2 : of, relating to, or marked by changes of volume or pressure under conditions of constant temperature

— iso·ther·mal·ly \-mə-lē\ adverb