Definition of roentgen in English:

roentgen

Line breaks: roent|gen
Pronunciation: /ˈrʌntdʒən
 
, ˈrəːnt-, ˈrɒnt-, -gən/
(also röntgen
, abbreviation: R)

noun

  • A unit of ionizing radiation, the amount producing one electrostatic unit of positive or negative ionic charge in one cubic centimetre of air under standard conditions.
    More example sentences
    • She talked about rems and rads and roentgens per hour, and at first, he tried to memorize her words, but he wasn't able to commit the information to memory.
    • A lethal exposure of radiation ranges from 300 to 500 roentgens an hour; levels in the tour areas vary from 15 to several hundred microroentgens an hour.
    • Some paramecium can withstand 200,000 roentgens.

Origin

1920s: named after Wilhelm Conrad Röntgen (1845–1923), German physicist, discoverer of X-rays.

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