←

roentgen

noun
🔊/ˈrɒntɡən/
🔊/ˈrentɡən/
(physics物理)
(abbreviation R)
jump to other results
  1. a unit of radiation, used to measure the quantity of X-rays or gamma radiation that have reached somebody/something伦琴（辐射单位）
    Word Origin1920s: named after Wilhelm Conrad Röntgen (1845–1923), German physicist, discoverer of X-rays.