Definition of isothermal in English:

isothermal

adjective

  • Involving or possessing a constant temperature.

    ‘the isothermal layer of the atmosphere’
    ‘the cells remained approximately isothermal during freezing’

noun

  • A line connecting points having the same temperature; an isotherm.

Pronunciation

isothermal

/ʌɪsə(ʊ)ˈθəːm(ə)l/