Subscriber login


Forgot your password?

Library card login

Other

roentgen


(also röntgen
, abbreviation: R)
Definition of roentgen

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.

Origin:

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

roentgen in other Oxford dictionaries

Definition of roentgen in the US English dictionary
  |  Cite

Word of the day

synodic

/ sɪˈnɒdɪk /
adjective
relating to or involving the conjunction of celestial objects …