Noun.  The more active isomer of clomiphene, which binds to estrogen receptors and stays bound for long periods of time, preventing normal receptor recycling and causing an effective reduction in hypothalamic estrogen receptor number.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.