17-ketosteroid
noun
\ ˈsev-ən-ˌtēn-
\
\
Medical Definition of 17-ketosteroid
: any of the ketosteroids (as androsterone, dehydroepiandrosterone, and estrone) that have the keto group attached to carbon atom 17 of the steroid ring structure, are present in normal human urine, and may be an indication of a tumor of the adrenal cortex or ovary when present in excess