from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A synthetic purine nucleoside analog, C8H10N5O3, derived from guanine and used in the treatment of herpes simplex, herpes zoster, and varicella zoster virus infections.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An antiviral drug used in the treatment of genital herpes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an oral antiviral drug (trade name Zovirax) used to treat genital herpes; does not cure the disease but relieves the symptoms
a-1 + cyclo- + vir(al) or vir(us).(American Heritage® Dictionary of the English Language, Fourth Edition)