roentgen
noun/ˈrɒntɡən/
/ˈrentɡən/
(physics) (abbreviation R)
- a unit of radiation, used to measure the quantity of X-rays or gamma radiation that have reached somebody/somethingWord Origin1920s: named after Wilhelm Conrad Röntgen (1845–1923), German physicist, discoverer of X-rays.
Check pronunciation:
roentgen