<p><strong>Noun</strong></p><ul><li>(Biochemistry)<ul><li>an estrogenic hormone, C₁₈H₂₁(OH)₃, occurring in urine during pregnancy.</li></ul></li><li>(Pharmacology)<ul><li>a commercial form of this compound, obtained from human placentas or the urine of pregnant women, used in conditions involving estrogen deficiency.</li></ul></li></ul>