Meaning of INFRARED in English

/ ˌɪnfrəˈred; NAmE / adjective

( physics ) having or using electromagnetic waves which are longer than those of red light in the spectrum , and which cannot be seen :

infrared radiation

an infrared lamp

—compare ultraviolet

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.