radiology

/R EY0 D IY0 AA1 L AH0 JH IY0/
noun
  1. 1

    The use of radioactive substances in diagnosis and treatment.

  2. 2

    The use of radiation (including ionizing radiation, especially X-rays) in diagnosis, usually through the formation of images.

  3. 3

    Radioscopy.

Source: https://en.wiktionary.org/wiki/radiology