• WordNet 3.6
    • adj infrared 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"
    • n infrared the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range "they could sense radiation in the infrared"
    • n infrared electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The common goldfish is the only animal that can see both infrared and ultra-violet light.
    • Infrared affected by infrared radiation; as, infrared detector; infrared film.
    • Infrared (Physics) 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.
    • Infrared relating to, using, or producing infrared radiation.
    • ***
Century Dictionary and Cyclopedia
    • infrared Below the red. The infra-red rays of the spectrum are those invisible rays which have a greater wave-length and are less refrangible than the red rays at the lower end of the visible spectrum. (See spectrum.) Contrasted with ultra-violet.
    • ***


Webster's Revised Unabridged Dictionary
Infra-, + red,


In literature:

It boils liquid metal and cooks out energy from the infrared right through to hard radiation.
"The K-Factor" by Harry Harrison (AKA Henry Maxwell Dempsey)
Treatment by vitamins, diet, antibiotics, infrared and ultraviolet rays, all were useless.
"Wind" by Charles Louis Fontenay
He switched on an infrared scanner.
"Pushbutton War" by Joseph P. Martino
Malone flicked on the infrared flashlight he held in his hand.
"Out Like a Light" by Gordon Randall Garrett
Rick would call it infrared.
"Smugglers' Reef" by John Blaine
They will see whoever it is on the infrared vision screen.
"The Lost Kafoozalum" by Pauline Ashwell
I never felt a thing except a faint warmth from infrared through my helmet.
"The Trouble with Telstar" by John Berryman
He turned slightly inside the suit and tried to judge the iceberg's distance through the infrared detector.
"The Dueling Machine" by Benjamin William Bova
The unit was battery-powered and had a bracket for mounting the infrared light used for night photography.
"The Wailing Octopus" by Harold Leland Goodwin
The infrared was useless; by it the flickering firelight was blinding.
"World of the Drone" by Robert Abernathy

In news:

Infrared device used to save Nevada man.
This company offers functional dyes from the visible to the near-infrared (NIR) range.
Infrared heaters deliver elementary lesson in economical comfort.
Western Heights Middle School received a grant from Audio Enhancement , a Utah company, for four infrared audio systems that are helping teachers and students in four classrooms hear each other better.
Rice University lab produces microscopic devices for fast manipulation of incident infrared light.
Infrared sauna in garage (Photo credit: Uncleweed).
A high-resolution infrared image shows Hurricane Michael churning in the Atlantic on Sept 6, 2012.
Michelle, and Infrared Image Solutions, Inc, of Hermiston, Oregon, allowed us to explore this question.
With the help of a $7,600 grant from the San Manuel Band of Mission Indians, Colton firefighters obtained a new infrared camera this month.
Beyerdynamic SIR Infrared Simultaneous Interpretation System.
The SIR Infrared Simultaneous Interpretation System from beyerdynamic wirelessly transmits multiple channels of audio for interpretation and assisted-listening purposes.
Advantages of Contact Thermometers over Non-Contact/Infrared Thermometers and other white papers at Electronic Products.
New infrared technology used to inspect bridges.
The staggering 9-gigapixel picture was created with data gathered by the Visible and Infrared Survey Telescope for Astronomy (VISTA), an instrument at the European Southern Observatory's Paranal Observatory in northern Chile.
What you're seeing there is the infrared image taken of the moon Mimas in 2010 and the other is of the moon Tethys taken this year.

In science:

Tseytlin, “Asymptotic freedom and infrared behavior in the type 0 string approach to gauge theory,” Nucl.
AdS/CFT Correspondence and Type 0 String Theory
These values naturally satisfy the usual RG infrared fixed point bound tan β > 1.5, which is just consistent with the present experimental lower limit on the lightest MSSM Higgs mass .
From Prototype SU(5) to Realistic SU(7) SUSY GUT
This function describes the extreme infrared properties of the Dirac spectrum.
Random Matrix Theory and Chiral Symmetry in QCD
Will this alignment be seen through infrared emission of small transiently heated small grains (e.g.
Physics of Grain Alignment
The photometric calibration was based on observations of Landolt (1992) standard stars for the optical data, and of HST standards from the list of Persson et al. (1998) for the infrared data.
EROs in the EIS Fields. I: The AXAF (Chandra) Deep Field