infrared
US /ˌɪn.frəˈred/
UK /ˌɪn.frəˈred/
名詞
紅外線的
the infrared region of the spectrum; infrared radiation.
形容詞
紅外線的
(of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.