Toyota Prefers Prii as the Plural of Prius

The Prius Goes Plural voting campaign was launched on Jan. 10 at the North American International Auto Show in Detroit and challenged the public to help the automaker Toyota determine the plural nomenclature of Prius.

The campaign coincided with the world premiere of the Toyota Prius family of vehicles. With 25 percent of the votes, Prii becomes the word not only endorsed by the public who chose it, but also as the term recognized by Toyota.

According to Toyota, has updated its entry for the word ‘Prius’ to reflect this.

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Toyota unveiled the winning word at the Chicago Auto Show Sunday (Feb. 20) morning. Jay Schwartz, head of content for, was on hand to inform the public that, as the plural of Prius has now been determined, the term ‘Prii’ will be reflected in

After the more than 1.8 million votes were cast during the course of the six-week campaign, Prii beat out its four competitors: Prius, Priuses, Prium and Prien.

[ Also Read: Toyota Plans to Produce New Electric Vehicles ]

Prius came in at a close second with 24 percent of the votes. A video recap of the campaign and winning word celebration can be viewed at

“Community has always been a big part of the Prius brand, so it was only fitting that we invite the online communities to participate in the plural discussion,” said Colin Morisako, advertising manager for Toyota. “The people have spoken—Prii will be the accepted term used to describe multiple Prius vehicles going forward.”

With the expansion of the Prius family to include the Prius Plug-in Hybrid vehicle (PHV), Prius v and Prius c concept, Toyota hopes to further increase acceptance of the Prius brand by offering a wider selection of vehicles.

Photo courtesy: Toyota

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