People pick Prius plurality
The results are in from Toyota's Facebook contest to decide the official plural form of Prius.
For the last three generations of the Toyota Prius' existence, Toyota has been curiously tight-lipped about the official plural form of the car's name. This has led to years of confusion, as journalists, dealers, and Prius enthusiasts--yes, they exist--coined all sorts of awkward terms, such as the difficult to say Priuses.
With the unveiling of the Prius V and the Prius C concept and the automaker's plans to expand Prius into a hybrid sub-brand, Toyota, for the first time, was forced to officially choose a plural form of Prius. So, the automaker crowdsourced it, running a contest on its Prius family Web site and on Facebook to decide the official plural form. Users could choose from one of five options: Prius, Priuses, Prii, Prium, and Prien.
This week, the automaker and the people have finally weighed in and come to a consensus. The official plural form of Prius is Prii, as in, "Peter passed a pack of parked Prii." Personally, I'm sticking with my personal plurality: Priopotami.