from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A crystalline alkaloid, C33H35N5O5, derived from ergot that induces vasoconstriction and is used especially in treating migraine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An alkaloid, extracted from ergot, that causes constriction of blood vessels and has been used to treat migraine; it is related to lysergic acid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine
From German Ergotamin, corresponding to ergot + amine. (Wiktionary)