adj.
Pronunciation: ˌ ī -s ə - ' th ə r-m ə l
Function: adjective
Etymology: French isotherme, from is- + -therme (fr. 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 \ -m ə -l ē \ adverb