1
- (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.（电磁辐射）红外的。
1.1
- (of equipment or techniques) using or concerned with this radiation（设备, 技术）使用红外的, 涉及红外的：
infrared cameras.
红外照相机。