roentgen

roentgen

 [rent´gen]

the international unit of x- or γ-radiation; it is the quantity of x- or γ-radiation such that the associated corpuscular emission per 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of electrical charge of either sign. Abbreviated R.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

Roent·gen

(rĕnt'gĕn),

Wilhelm K., German physicist and Nobel laureate, 1845-1923. Discovered x-rays in November, 1895; awarded Nobel Prize in Physics in 1901 for his discovery. See: roentgen, roentgen ray.

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roent·gen (R, r),

(rĕnt'gĕn, rent'chen),

The international unit of exposure dose for x-rays or gamma rays; that quantity of radiation that will produce, in 1 cc or 0.001293 g of air at STP, 2.08 × 10⁹ ions of both signs, each totaling 1 electrostatic unit (esu) of charge; in the MKS system this is 2.58 × 10^-4 coulombs per kg of air.

[Wilhelm K. Roentgen]

Farlex Partner Medical Dictionary © Farlex 2012

roentgen

also

röntgen

(rĕnt′gən, -jən, rŭnt′-)

n. Abbr. R or r

A unit of radiation exposure equal to the quantity of ionizing radiation that will produce one electrostatic unit of electricity in one cubic centimeter of dry air at 0°C and standard atmospheric pressure.

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roent′gen adj.

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

roent·gen

(r, R) (rent'gen)

The international unit of exposure dose for x-rays or gamma rays; that quantity of radiation that will produce in 1 cm of air at STP, or 0.001293 g of air, 2.08 × 10⁹ ions of both signs, each totaling 1 electrostatic unit (e.s.u.) of charge; in the MKS system this is 2.58 × 10^-4 coulombs per kg of air.

[Wilhelm K. Roentgen]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Roentgen

or

Röntgen, Wilhelm Konrad

(1845–1923) German physicist who discovered X-RAYS. A roentgen or röntgen is the quantity of X-rays or gamma radiation used as a unit of radioactivity. Symbol: R or r.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Roentgen,

Wilhelm K., German physicist and Nobel laureate, 1845-1923.

roentgen - the international unit of exposure dose for x-rays or gamma rays.

roentgen ray - Synonym(s): x-ray

roentgenograph - Synonym(s): radiograph

Medical Eponyms © Farlex 2012