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Definition of roentgen noun from the Oxford Advanced American Dictionary

 

roentgen

 noun
noun
NAmE//ˈrɛntɡən//
 
, NAmE//ˈrʌntɡən//
 
, NAmE//ˈrɛntdʒən//
 
, NAmE//ˈrʌntdʒən//
 
(physics) (abbreviation R)
 
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a unit of radiation, used to measure the quantity of X-rays or gamma radiation that has reached someone or something
See roentgen in the Oxford Advanced Learner's Dictionary
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