progesterone

  1. Noun.  (steroid hormone, uncountable) A steroid hormone, secreted by the ovaries, whose function is to prepare the uterus for the implantation of a fertilized ovum and to maintain pregnancy.
  2. Noun.  (steroid drug, countable) A synthetic version of the compound, used in contraceptive pills and other pharmaceutical products.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license.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.