Definition of "norethindrone" [norethindrone]

• A progestational hormone, C20H26O2, similar in effect to progesterone, used especially in oral contraceptives. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "(Chemically, norethindrone is 17a-ethinyl-19-nortestosterone; its generic name in Europe is norethisterone)."
• "Some women find that taking an oral contraceptive that contains the older progestin called norethindrone at a dose of 1.5 nanograms helps restore the proper balance for libido."
• "She also tries different hormones, such as norethindrone, a type of progesterone more commonly used in Europe."