from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A short polypeptide hormone, C43H66N12O12S2, released from the posterior lobe of the pituitary gland, that stimulates the contraction of smooth muscle of the uterus during labor and facilitates ejection of milk from the breast during nursing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hormone that stimulates contractions during labour/labor, and then the production of milk.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk
From oxytocic, from Ancient Greek ὀξύς (oxus, "swift") + τόκος (tokos, "childbirth"), from τίκτω (tiktō, "I give birth"). (Wiktionary)