isothermal Meaning, Definition & Usage

  1. adjective satellite of a process or change taking place at constant temperature

WordNet

I`so*ther"mal adjective
Etymology
Cf. F. isotherme.
Definitions
  1. Relating to equality of temperature.
  2. (Phys. Geog.) Having reference to the geographical distribution of temperature, as exhibited by means of isotherms; as, an isothermal line; an isothermal chart.

Webster 1913