4-Androstene-3,17-dione; androstanedione with a double bond between C-4 and C-5; an androgenic steroid of weaker biological potency than testosterone; secreted by the testis, ovary, and adrenal cortex.
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an·dro·stene·di·one .an-drə-.stēn-'dī-.ōn, -'stēn-dē-.ōn n a steroid sex hormone C19H26O2 that is secreted by the testes, ovaries, and adrenal cortex and is a precursor of testosterone and estrogen
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n.
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an·dro·stene·di·one (an″dro-stēn-diґōn) (-stēnґde-ōn) an anabolic-androgenic steroid produced by the testis, adrenal cortex, and ovary, occurring as two types, Δ4-androstenedione and Δ5-androstenedione. Androstenediones can be converted metabolically to testosterone and other androgens.Medical dictionary. 2011.