Androstenedione Definition

A weak hormone, C₁₉H₂₆O₂, produced by the ovaries, testes, and adrenal glands as a precursor to estrogen, testosterone, etc.: formerly taken in a concentrated tablet or capsule form as by some bodybuilders.

An unsaturated androgenic steroid, C₁₉ H₂₆ O₂ , that is secreted by the testis, ovary, and adrenal cortex and is a precursor of both androgens and estrogens. Until 2005, when its nonprescription sale and use became illegal in the United States, synthetic androstenedione was used as a dietary supplement to enhance athletic performance.