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denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, i.e., of 0.75–1000 μm. Infrared rays are sometimes subdivided into long-wave or far infrared (about 3.0–1000 μm) and short-wave or near infrared (about 0.75–3.0 μm). They are capable of penetrating body tissues to a depth of 1 cm. Sources of infrared rays include heat lamps, hot water bottles, steam radiators, and incandescent light bulbs. Infrared rays are used therapeutically to promote muscle relaxation, to speed up the inflammatory process, and to increase circulation to a part of the body. See also heat.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·fra·red (IR, ir),

That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm.
Farlex Partner Medical Dictionary © Farlex 2012


That portion of the electromagnetic spectrum with wavelengths between 770-1000 nm.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


the electromagnetic radiation in the region between red light and radio waves. see ELECTROMAGNETIC SPECTRUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

infrared (IR)

Radiant energy of wavelengths between the extreme red wavelengths of the visible spectrum and a wavelength of a few millimetres. The wave band comprising radiations between 780 and 1400 nm is referred to as IR-A. Excessive exposure to these radiations can cause visual loss (e.g. eclipse blindness) and cataract. The waveband comprising radiations between 1400 and 3000 nm is referred to as IR-B. Excessive exposure to these radiations can cause cataract and corneal opacity. The wave band comprising radiations between 3000 and 1 ✕ 106 nm (or 1 mm) is referred to as IR-C. Excessive exposure to these radiations can cause cataract (heat-ray cataract). See eclipse blindness; absorptive lens; infrared optometer.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Irda has defined 46 common terms and 11 critical illness procedures
According to the new IRDA norms the benefit payable on death in these products shall be the sum assured chosen by the policyholder, together with the balance in the policy account as on the date of death.
But Irda has not given the method to be used for calculating the charges.
A senior IRDA official said that the insurance regulator is not in favour of allowing IPOs by life insurers who have been in business for less than ten years, a condition holding up the IPO guidelines for the sector.
In order to ensure that the policyholders do not lock themselves in current ULPs, it is hereby ordered that the insurers shall not sell any ULPs from the close of business on October 22, 2010," the IRDA said on Thursday.
At present, life insurance premiums are based on the last Irda data of 1994-96, modified in line with insurers own risk assessment.
Reliance Life Insurance president and executive director Malay Ghosh, said, " We have received approval from IRDA for two unit- linked insurance plans." RLIC said it is expected to soon launch the approved Ulips -- Reliance Life Highest NAV Advantage Plan and Reliance Life Classic Plan.
IRDA, the insurance regulator in India, has said that Indian promoters need to hold 26 per cent in insurance joint ventures.
"Irda's primary focus has always been, and will continue to remain, the protection of policyholders' interests." J.
He also asked the industry to make the new grievance redressal mechanism set up by Insurance Regulatory and Development Authority ( IRDA) a success.
The Indian insurance regulator, Irda, has issued new guidelines for the sale of insurance policies.
THE Insurance Regulatory and Development Authority ( IRDA) on Wednesday said it will follow the Delhi High Court's ( HC) direction to take steps on resuming cashless facility to policyholders.