ethynodiol

[ĕ-thī′nə-dīôl′, -ōl′]
n.
  1. A semisynthetic steroid having similar biophysiological effects as progesterone and administered with an estrogen as an oral contraceptive.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.