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[proh-jes-tin] /proʊˈdʒɛs tɪn/
noun, Pharmacology
any substance having progesteronelike activity.
Also called progestogen.
1925-30; pro-1 + gest(ation) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for progestin
  • Hormonal implants, matchstick-sized rods that are placed under the skin surface, emit a progestin type hormone for three years.
  • All hormonal birth control uses estrogen mixed with progestin or progestin only.
  • The rod releases into the bloodstream tiny amounts of the hormone progestin.
  • progestin-releasing intrauterine systems and leiomyoma.
  • In such cases, the next step may be to administer estrogen followed by progestin.
British Dictionary definitions for progestin


any of a group of steroid hormones that have progesterone-like activity, used in oral contraceptives and in treating gynaecological disorders
Word Origin
C20: from progest(erone) + -o- + -gen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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progestin in Medicine

progestin pro·ges·tin (prō-jěs'tĭn)

  1. A natural or synthetic progestational substance that mimics some or all of the actions of progesterone.

  2. A crude hormone of the corpus luteum from which progesterone can be isolated in pure form. No longer in technical use.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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