from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A synthetic antiviral ribonucleoside, C8H12N4O5, that inhibits the replication of DNA and RNA, used to treat respiratory syncytial virus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An antiviral drug used to treat a number of DNA and RNA viruses.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an inhaled antiviral agent (trade name Virazole) that may be used to treat serious virus infections
Probably rib(onucleic) a(cid) + vir(us) + -in.(American Heritage® Dictionary of the English Language, Fourth Edition)