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androstenedione

an·dro·stene·di·one

noun
\ˌan-drə-ˌstēn-ˈdī-ˌōn, -ˈstēn-dē-ˌōn\

: 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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