Viagra

Viagra

[vahy-ag-ruh]
Pharmacology, Trademark.
a brand of sildenafil citrate, used to treat impotence.
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Collins
World English Dictionary
Viagra (vaɪˈæɡrə, viː-)
 
n
trademark a drug, sildenafil, that allows increased blood flow into the penis; used to treat erectile dysfunction in men

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

Viagra
1998, proprietary name of drug manufactured by Pfizer company.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

Viagra Vi·ag·ra (vī-āg'rə)
n.
A trademark used for the drug sildenafil citrate.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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