infrared

(noun, adjective)

adjective

1. 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

- infrared light

Similar word(s): invisible, unseeable

noun

1. the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range

- they could sense radiation in the infrared

Definition categories: attribute, frequence, frequency, oftenness

2. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

Definition categories: phenomenon