IPA: //ˌrɛntɡənˈoʊlədʒi//
KK: /ˈrɛntɡənˌoʊlədʒi/
A branch of medicine that uses X-rays to diagnose and treat diseases.
Roentgenology is essential for detecting fractures and other internal injuries.
Roentgenology → It is formed from "Roentgen" (the surname of Wilhelm Conrad Roentgen, the discoverer of X-rays) and "-ology" (from Greek "-logia", meaning the study of). The word refers to the study of X-rays and their applications in medicine.
Think of Wilhelm Roentgen, who discovered X-rays, and remember that '-ology' means the study of something. So, roentgenology is the study of X-rays.
No commonly confused words.