Definitions

1. adjective

relating to or producing energy that does not involve thermal (heat) effects

“The nonthermal plasma was used in the experiment.”

2. noun

a process or phenomenon that does not involve the production or transfer of heat

“The researcher studied the properties of a nonthermal phenomenon.”

3. adverb

in a manner that does not involve the production or transfer of heat

“The nonthermal reaction was carried out under controlled conditions.”