from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See estrone.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The steroid hormone estrone.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency
Greek thēlus, female; see dhē(i)- in Indo-European roots + -in.(American Heritage® Dictionary of the English Language, Fourth Edition)