Try Our Apps


Words You've Been Using Wrong


[proh-jes-tuh-rohn] /proʊˈdʒɛs təˌroʊn/
Biochemistry. a hormone, C 2 1 H 3 0 O 2 , that prepares the uterus for the fertilized ovum and maintains pregnancy.
Pharmacology. a commercial form of this compound, obtained from the corpus luteum of pregnant sows or synthesized: used in the treatment of dysfunctional uterine bleeding, dysmenorrhea, threatened or recurrent abortion, etc.
Origin of progesterone
1930-35; blend of progestin and luteosterone (< German Luteosteron, synonymous with progestin, equivalent to Luteo- luteo- (representing corpus luteum) + -steron (see sterol, -one)) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for progesterone
Contemporary Examples
British Dictionary definitions for progesterone


a steroid hormone, secreted mainly by the corpus luteum in the ovary, that prepares and maintains the uterus for pregnancy. Formula: C21H30O2 Also called corpus luteum hormone
Word Origin
C20: from pro-1 + ge(station) + ster(ol) + -one
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
Cite This Source
Word Origin and History for progesterone

female steroid sex hormone which prepares the uterus for child-bearing, 1935, from German Progesteron, from progestin (from which substance it was obtained), which had been coined 1930 from pro- (see pro-) + Latin gestare, literally "to carry about" (see gestation), on notion of "substance which favors gestation." Also see -one.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
progesterone in Medicine

progesterone pro·ges·ter·one (prō-jěs'tə-rōn')

  1. A steroid hormone secreted by the corpus luteum and by the placenta, that acts to prepare the uterus for implantation of the fertilized ovum, to maintain pregnancy, and to promote development of the mammary glands. Also called corpus luteum hormone, luteohormone, progestational hormone.

  2. A drug prepared from natural or synthetic progesterone, used for the prevention of miscarriage and the treatment of menstrual disorders.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
progesterone in Science
A steroid hormone that prepares the uterus for pregnancy, maintains pregnancy, and promotes development of the mammary glands. The main sources of progesterone are the ovary and the placenta. Chemical formula: C21H30O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for progesterone

Difficulty index for progesterone

Most English speakers likely know this word

Word Value for progesterone

Scrabble Words With Friends