from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A drug, C22H30N6O4S, used to treat sexual dysfunction by increasing the level of cyclic GMP, which increases blood flow to erectile tissues.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A drug, whose citrate is marketed as Viagra; a treatment for erectile dysfunction.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. virility drug (trade name Viagra) used to treat erectile dysfunction in men
Perhaps alteration of s(ulfon)yl + (pyrimi)dine + ph(en)yl.(American Heritage® Dictionary of the English Language, Fourth Edition)