virii

• IPA^(key): /ˈvaɪɹaɪ/, /ˈvaɪɹaɪˌaɪ/, /ˈvɪɹiːˌiː/

virii

1. (proscribed) plural of virus

• The plural virii, though common, is based on a misunderstanding of Latin. In classical Latin, virus appears to be a singulare tantum without any attested plural. If virus were a masculine 2nd declension noun, it would form its plural with a singular -i as viri. In fact as a neuter 2nd declension noun, in New Latin, the plural is formed as vira.

• Plural of virus on Wikipedia.Wikipedia