这个词是什么意思？
An aromatized C18 steroid with a 3-hydroxyl group and a 17-ketone, a major mammalian estrogen. It is converted from ANDROSTENEDIONE directly, or from TESTOSTERONE via ESTRADIOL. In humans, it is produced primarily by the cyclic ovaries, PLACENTA, and the ADIPOSE TISSUE of men and postmenopausal women.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D004970 · MeSH 2026。
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