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acronym for radiation absorbed dose; a unit of measurement of the absorbed dose of ionizing radiation. It corresponds to an energy transfer of 100 ergs per gram of any absorbing material (including tissue). The biological effect of 1 rad of radiation varies with the type of radiation. When the dose is in rems, all types have the same biological effect.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Abbreviation for reactive airway disease.
1. The unit for the dose absorbed from ionizing radiation, equivalent to 100 ergs per gram of tissue; 100 rad = 1 Gy.
2. Symbol for radian.
Farlex Partner Medical Dictionary © Farlex 2012
An obsolete unit of ionising radiation (X-rays, gamma rays), which corresponds to an energy absorption of 100 ergs/g of tissue.
Slang abbreviation of radical, used popularly to describe something or someone as being exceptionally pleasing or exciting.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
radPhysics An obsolete unit of ionizing radiation–X-rays, γ rays–corresponding to an energy absorption of 100 ergs/g of tissue. Cf Gray, Roentgen.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
Abbreviation for radian.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
radA unit of dosage of absorbed ionizing radiation. The rad is equal to 0.01 joule of absorbed energy per kilogram of the exposed tissue or other material.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
The unit for the dose absorbed from ionizing radiation, equivalent to 100 ergs per gram of tissue; 100 rad = 1 Gy.
Medical Dictionary for the Dental Professions © Farlex 2012