1

roentgen

adjective roent·gen \ ˈrent-gən , ˈrənt- , -jən , -shən \

Definition of roentgen

: of or relating to X-rays
  • roentgen examinations

Origin and Etymology of roentgen

International Scientific Vocabulary, from Wilhelm Röntgen


2

roentgen

noun

Definition of roentgen

: the international unit of x-radiation or gamma radiation equal to the amount of radiation that produces in one cubic centimeter of dry air at 0°C and standard atmospheric pressure ionization of either sign equal to one electrostatic unit of charge

First Known Use of roentgen

1922

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Roentgen

biographical name

Definition of Roentgen

— see röntgen

Medical Dictionary

1

roentgen

adjective roent·gen
variants: also röntgen play \ˈrent-gən, ˈrənt-, -jən; ˈren-chən, ˈrən-\

medical Definition of roentgen

: of, relating to, or using X-rays : x-ray
  • roentgen examinations
  • roentgen therapy

Biographical Note for roentgen

Röntgen or Roentgen play \ˈrœnt-gən\; Wilhelm Conrad (1845–1923), German physicist. Röntgen is famous for his discovery of X-rays in 1895. He made the discovery while experimenting with electric current flow in a cathode-ray tube. He observed that a nearby piece of the platinocyanide of barium gave off light when the tube was in operation. He attributed the fluorescence of the chemical to some unknown form of radiation. Because of the uncertain nature of the radiation he called the phenomenon X radiation. For his discovery of X-rays he was awarded the Nobel Prize for Physics in 1901. His discovery had a great impact on both physics and medicine.

2

roentgen

noun
variants: also röntgen

medical Definition of roentgen

: the international unit of x-radiation or gamma radiation equal to the amount of radiation that produces in one cubic centimeter of dry air at 0°C (32°F) and standard atmospheric pressure ionization of either sign equal to one electrostatic unit of charge

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