from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several steroid hormones produced chiefly by the ovaries and responsible for promoting estrus and the development and maintenance of female secondary sex characteristics.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a group of steroids that are secreted by the ovaries and function as female sex hormones.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
estr(us) + -gen.(American Heritage® Dictionary of the English Language, Fourth Edition)
From estrus + -gen (“a producer of”) (Wiktionary)