The Plural Of Prius is Priora You On Here » The Plural Of Prius is Priora

Toyota is asking "What is the plural of Prius?".  

Since Prius is a Latin word, if it is pluralized in Latin, they should probably be called "Prius"  or "Priora".  Apparently "Prii" is not correct.

There is a long explanation here (not mine).

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