It's viruses
I didn't write this:
'...There is no such word as 'virii'. This is faux Latin hypercorrectness. Latin words ending in -us form the plural in -i if they're second declension nouns. However, 'virus' is not. It is a fourth declension mass noun, and has no distinct plural. Its English plural is simply 'viruses'.'
( ,
Fri 11 Jun 2004, 16:46,
archived)
'...There is no such word as 'virii'. This is faux Latin hypercorrectness. Latin words ending in -us form the plural in -i if they're second declension nouns. However, 'virus' is not. It is a fourth declension mass noun, and has no distinct plural. Its English plural is simply 'viruses'.'