electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves可視光線より長く、電波より短い波長の電磁放射赤外線
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared"電磁スペクトルの赤外線の部分赤外
having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end; "infrared radiation"; "infrared photography"光よりも長い波長であるが電波よりも短い波長をもちまたは使用する赤外