Is the plural of virus "viruses" or "virii"?
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Wikipedia has a rather large section dedicated to this question. The verdict is: “The English plural of virus is viruses, not viri.” Merriam-Webster agrees, as does TheFreeDictionary. Wiktionary offers the following usage notes:
Speaking as a descriptivist, I would have to say that "virii" does indeed exist, in English rather than bad Latin, but only as a whimsical or jocular form (and particularly in an IT context). Strictly "viruses" for an unmarked usage.
protected by tchrist Apr 26 '15 at 1:18
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