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Wiktionary
nonthermal

a. Not thermal; not produced by heat alt. Not thermal; not produced by heat

WordNet
nonthermal

adj. not involving heat; "nonthermal luminescence" [ant: thermal]

Usage examples of "nonthermal".

In eluded were the three senior science officers, the chief surgeon, and one ensign, who had a professional interest in nonthermal sources of boson radiation.

Should these latter encounter some nonthermal energetic electrons also traveling along the field lines, then the plasma waves could be amplified by selectively removing energy from the electrons.

And in a lecture at Princeton in 1953 he proposed that contrary to the prevailing view of Jupiter's being cold and dead, it should be emitting nonthermal radio energy.

If there are working human devices aboard the stations, there is bound to be a leakage of nonthermal, nonrandom radiation.