noun
- The infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range.
- usage: "they could sense radiation in the infrared"
- synonyms: infrared frequency
- Electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves.
- synonyms: infrared light, infrared radiation, infrared emission
adjective
- Having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end.
- usage: "infrared radiation"; "infrared photography"
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). infrared. Retrieved September 21, 2026, from http://smartdefine.org/infrared/definitions/1176581 |
| Chicago | WordNet. 2010. "infrared" http://smartdefine.org/infrared/definitions/1176581 (accessed September 21, 2026). |
| Harvard | WordNet 2010, infrared, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/infrared/definitions/1176581>. |
| MLA | WordNet. "infrared" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/infrared/definitions/1176581> |