Of or relating to the range of invisible radiation wavelengths from about 750 nanometers, just longer than red in the visible spectrum, to 1 millimeter, on the border of the microwave region.
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- 紅外線(xiàn)的：一種波長(cháng)在750毫微米（比可見(jiàn)光譜中的紅光稍長(cháng)）與1毫米（在微波波長(cháng)的邊緣）之間的不可見(jiàn)輻射的，或與其有關(guān)的
