Definition of cortisone noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈkɔːtɪzəʊn//
; NAmE NAmE//ˈkɔːrtəsoʊn//
; BrE BrE//ˈkɔːtɪsəʊn//
; NAmE NAmE//ˈkɔːrtəzoʊn//
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a hormone used in the treatment of diseases such as arthritis, to reduce swelling Word Origin 1940s: from elements of its chemical name 17-hydroxy-11-dehydrocorticosterone.
See the Oxford Advanced American Dictionary entry: cortisone