roentgen


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Related to roentgen: Roentgen equivalent man, roentgen ray

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.

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.

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]

roentgen

/roent·gen/ (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 dry air produces in air ions carrying 1 electrostatic unit of electrical charge of either sign. Symbol R.

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.

roent′gen adj.

roentgen (R)

[rent′gən, ren′jən]
Etymology: Wilhelm K. Roentgen, German physicist, 1845-1923
the quantity of x-radiation or gamma radiation that creates 1 electrostatic unit of ions in 1 mL of air at 0° and 760 mm of pressure. In radiotherapy or radiodiagnosis, the roentgen is the unit of the emitted dose. See also radiation absorbed dose, rem.

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]

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.

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

roentgen

a superseded 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. Now replaced by coulomb/kg (C/kg); see coulomb. 1 R = 2.58 × 10−4 C/kg; 1 C/kg = 3876 R.

roentgen equivalent man (rem)
see rem.
roentgen equivalent physical (rep)
see rep.
roentgen ray
x-ray.
References in periodicals archive ?
There is a suite of Roentgen furniture at Buckingham Palace, and another at Chatsworth ordered by the Duke of Devonshire at a time when many English grandees, as well as wealthy aristos throughout Europe, chose Roentgen furniture for their palaces.
Total quantity or scope: Digital roentgen apparatus according to the features mentioned in the specifications.
Priscilla Slanetz said at the annual meeting of the American Roentgen Ray Society.
Although German physicist Wilhem Roentgen discovered X-rays in 1896, it was a Birmingham surgeon - Major John Hall-Edwards - who first applied the new technology to medical treatment.
Wilhelm Konrad Roentgen discovered X-rays, a form of energy, a century ago.
craft called the Roentgen Satellite, or ROSAT (SN: 6/29/91, p.
Rem is an abbreviation for roentgen equivalent man, a measurement of ionizing radiation.
MIAMI BEACH -- Magnetic resonance imaging can visualize uterine fibroids in sufficient detail that a potentially ineffective uterine artery embolization can be avoided in up to 20% of patients who are referred for the procedure, according to a study presented at the annual meeting of the American Roentgen Ray Society.
For it is the opulent, extravagant eighteenth century of Boulle and Riesener and Roentgen that has been the traditional draw of the Biennale--a draw, not least, for generations of wealthy Francophile Americans (a rare sighting in 2002; everyone is hoping the September migration will resume this year).
MIAMI BEACH -- Magnetic resonance imaging visualizes uterine fibroids in enough detail that a potentially ineffective uterine artery embolization can be avoided in up to 20% of patients referred for the procedure, according to a study presented at the annual meeting of the American Roentgen Ray Society.
1895: Professor Wilhelm Conrad Roentgen carried out the first ever X-ray: ProfessorRoentgen was a highly unremarkable German physicist who specialised in the areas of thermology, mechanics and electricity.
In February, ROSAT (short for Roentgen Satellite) completed its first assignment: a search for low-energy X-ray sources throughout nearly the entire sky.