<p><strong>Noun</strong></p><ul><li>In biochemistry, the sex hormone C₁₉H₂₈O₂, secreted by the testes, that stimulates the development of male sexual organs, secondary sexual traits, and sperm.</li><li>In pharmacology, a commercially prepared form of the sex hormone C₁₉H₂₈O₂, originally isolated from bull's testes and now also produced synthetically, used in medicine chiefly for the treatment of testosterone deficiency and for certain gynecological conditions.</li></ul>