Definition of radiationless in English:

radiationless

adjective

Chemistry Physics
  • Not involving the emission of electromagnetic radiation.

Origin

Early 20th century; earliest use found in Proceedings of the National Academy of Sciences of the United States of America. From radiation + -less.

Pronunciation

radiationless

/ˌreɪdɪˈeɪʃnləs//ˌreɪdɪˈeɪʃənləs/