■ noun electromagnetic radiation having a wavelength just greater than that of red light but less than that of microwaves, emitted particularly by heated objects.
■ adjective of or denoting such radiation.
■ noun electromagnetic radiation having a wavelength just greater than that of red light but less than that of microwaves, emitted particularly by heated objects.
■ adjective of or denoting such radiation.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004