an orally active progestin, C20H26O2, used as a progesterone, especially as an oral contraceptive in combination with an estrogen.
Origin of norethindrone
by shortening and alteration of parts of its chemical name
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
A progestational agent with some estrogenic and androgenic activity that is used as a substitute for progesterone and, in combination 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.