[rent-guh
n, -juhn, ruhnt-; Ger. rœnt-guhn; Du. roont-khuhn] 
| 1. | Ju⋅li⋅us [yoo-lee-uhs] , 1855–1932, Dutch pianist, conductor, and composer; born in Germany. |
| 2. | Wil⋅helm Kon⋅rad [wil-helm kon-rad; Ger. vil-helm kawn-raht] . Roentgen, Wilhelm Konrad. |
[rent-guhn, -juhn, ruhnt-; for 1 also Ger. rœnt-guhn] | 1. | Wil⋅helm Kon⋅rad [wil-helm kon-rad; Ger. vil-helm kawn-raht] , 1845–1923, German physicist: discoverer of x-rays 1895; Nobel prize 1901. |
| 2. | (lowercase) Physics. a unit of exposure dose that measures x-rays or gamma rays in terms of the ions or electrons produced in dry air at 0° C and one atmosphere, equal to the amount of radiation producing one electrostatic unit of positive or negative charge per cubic centimeter of air. Abbreviation: r, R |
| 3. | (sometimes lowercase) of or pertaining to Wilhelm Roentgen, the Roentgen unit, or esp. to x-rays. |
| roent·gen also rönt·gen (rěnt'gən, -jən, rŭnt'-) n. Abbr. R or r A unit of radiation exposure equal to the quantity of ionizing radiation that will produce one electrostatic unit of electricity in one cubic centimeter of dry air at 0°C and standard atmospheric pressure. [After Wilhelm Konrad Roentgen.] roent'gen adj. |
| Roent·gen (rěnt'gən, -jən, rŭnt'-) German physicist who discovered x-rays and developed x-ray photography, revolutionizing medical diagnosis. He won a 1901 Nobel Prize. |
| rönt·gen (rěnt'gən, -jən, rŭnt'-) n. Variant of roentgen. |
| Rönt·gen (rɶnt'gən) See Wilhelm Konrad Roentgen. |
Roentgen Roent·gen (rěnt'gən, -jən, rŭnt'-) or Rönt·gen (rɶnt'gən), Wilhelm Konrad. 1845-1923.
German physicist who discovered x-rays and developed x-ray photography, revolutionizing medical diagnosis. He won a 1901 Nobel Prize.
röntgen rönt·gen (rěnt'gən, -jən, rŭnt'-)
n.
Variant of roentgen.
| Roentgen (rěnt'gən, rěnt'jən) Pronunciation Key
German physicist who discovered x-rays in 1895 and went on to develop x-ray photography, which revolutionized medical diagnosis. In 1901 he was awarded the Nobel Prize for physics. |