roentgen

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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

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.

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
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.
But Roentgen always went one better than most, and David Roentgen delivered in the winter of 1785, an automatic masterpiece, where a mechanical doll, dressed in the latest fashion, played music by Gluck (who had taught the queen while still a child in Vienna) and resembled the queen herself.
All a bit creepy really, but, it was a triumph of some brilliance for Roentgen who was awarded, in 1779, the coveted title of Cabinet Maker and Mechanical Engineer to to the king and queen of France.