from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A progestational hormone, C20H26O2, similar in effect to progesterone, used especially in oral contraceptives.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a synthetic progestational hormone (trade name Norlutin) used in oral contraceptives and to treat endometriosis
nor- + alteration of ethyn(e) + (an)dr(ostene), a steroid + -one.(American Heritage® Dictionary of the English Language, Fourth Edition)