infrared

• POS: Adjective, Noun
• HYPHEN: in=fra=red

CIDE DICTIONARY

infrared, a. [Infra- + red.].

•  Lying outside the visible spectrum at its red end; -- said of rays having a longer wavelength (and thus less refrangible) than the extreme red rays, specifically those electromagnetic waves having a wavelength of between 700 nanometers and 1 millimeter.  [Webster 1913 Suppl.]
•  relating to, using, or producing infrared radiation.  [PJC]
•  affected by infrared radiation; as, infrared detector; infrared film.  [PJC]

OXFORD DICTIONARY

infrared, adj.
1 having a wavelength just greater than the red end of the visible light spectrum but less than that of radio waves.
2 of or using such radiation.