Definition of Prius

I was thinking about the word "prius" just yesterday. And when I start thinking about something, I need to hit the internet and find the answers to my questions. I spent a little bit of time doing my research and found what I was looking for, that is if you can believe what you read on wikipedia.

The word "prius" is a Latin word. It is a comparative adjective or adverb with meanings "ahead, in front, leading, prior; before, previously, first." Latin has gender divisions for some plurals. The masculine for prius would be prium, the feminine would be prieau (pronounced Pre-ay). There is a quote on wikipedia from a Toyota spokesperson who stated that "Toyota chose this name because the Prius vehicle is the predecessor of cars to come."

That is all fine, but what is the plural of Prius? I did some more research and found a quote on a Prius owner's forum. The state that they, asked a Toyota executive in charge of the initial Prius rollout how his people refer to more than one Prius. His response was "Prius". Since Toyota built and named the car and they refer to more than one as a "Prius", that must be the plural form of the word. Some people do like to refer to more than one as "Prii" and I even saw an arguement that said that if we say two "geniuses" it would follow that we say two "Priuses'.

I still don't know what I will call more than one Prius, but I do know that I am happy with my purchase so far.