Definition of radiative equilibrium in US English:

radiative equilibrium

noun

Astronomy Meteorology
  • A state of equilibrium (as in a star or the atmosphere) in which the total flux of emitted energy is equal to the flux of that absorbed; a state of equilibrium in which radiation is the predominant energy transport mechanism.

Origin

Early 20th century; earliest use found in Arthur Eddington (1882–1944), theoretical physicist and astrophysicist.