IPA: //ˈkɔːrtɪsoʊn//
KK: /ˈkɔrtɪˌsoʊn/
A type of steroid hormone produced by the adrenal glands that helps regulate metabolism and is often used to treat inflammation and various medical conditions.
The doctor prescribed cortisone to help reduce the swelling in my joints.
Cortisone is derived from "cortex" (from Latin, meaning bark or outer layer) and the suffix "-one" (indicating a ketone or steroid). The word refers to a steroid hormone produced by the outer layer of the adrenal gland, hence its connection to the term for outer layer.
Think of 'cortex' as the outer layer of something, like the adrenal gland, and remember that cortisone is a hormone from that outer layer.