[ rey-dee-ol-uh-jee ]

  1. the science dealing with x-rays or nuclear radiation, especially for medical uses.

  2. the examination or photographing of organs, bones, etc., with such rays.

  1. the interpretation of medical x-ray photographs.

Origin of radiology

First recorded in 1895–1900; radio- + -logy

Other words from radiology

  • ra·di·ol·o·gist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use radiology in a sentence

British Dictionary definitions for radiology


/ (ˌreɪdɪˈɒlədʒɪ) /

  1. the use of X-rays and radioactive substances in the diagnosis and treatment of disease

Derived forms of radiology

  • radiologist, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for radiology


[ rā′dē-ŏlə-jē ]

  1. The branch of medicine that deals with diagnostic images of anatomic structures through the use of electromagnetic radiation or sound waves and that treats disease through the use of radioactive compounds. Radiologic imaging techniques include x-rays, CAT scans, PET scans, MRIs, and ultrasonograms.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for radiology


[ (ray-dee-ol-uh-jee) ]

The branch of medicine devoted to the study of images obtained by x-ray, ultrasound, CAT scans, or magnetic resonance imaging, and to the treatment of cancer by radiation therapy.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.