- the use of X-rays and radioactive substances in the diagnosis and treatment of disease
WordReference Random House Learner's Dictionary of American English © 2026
ra•di•ol•o•gy /reɪdiˈɑlədʒi/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- Medicinethe branch of medicine dealing with x-rays, other radiation, and other techniques used in examining the body for disorders and certain treatments.
ra′di•ol•o•gy
(rā′dē ol′ə jē),USA pronunciation n.
ra′di•ol′o•gist, n.
- Medicine, Physicsthe science dealing with x-rays or nuclear radiation, esp. for medical uses.
- Medicinethe examination or photographing of organs, bones, etc., with such rays.
- Medicinethe interpretation of medical x-ray photographs.
- radio- + -logy 1895–1900
Collins Concise English Dictionary © HarperCollins Publishers::
radiology /ˌreɪdɪˈɒlədʒɪ/ n
'radiology' also found in these entries (note: many are not synonyms or translations):