Toyota Prius hybrid 2011 Best Seller

The Toyota Prius (play /ˈpriːəs/; plural: Prii, /ˈpriːaɪ/) is a full hybrid electric mid-size hatchback, formerly a compact sedan developed and manufactured by the Toyota Motor Corporation. The EPA and California Air Resources Board (CARB) rate the Prius as among the cleanest vehicles sold in the United States based on smog forming and toxic emissions

The Prius first went on sale in Japan in 1997, making it the first mass-produced hybrid vehicle. It was subsequently introduced worldwide in 2001. The Prius is sold in more than 70 countries and regions, with its largest markets being those of Japan and North America. In May 2008, global cumulative Prius sales reached the milestone 1 million vehicle markand in September 2010, the Prius reached worldwide cumulative sales of 2.0 million units.The U.S. is the largest market, with 1 million Prii sold by early April 2011
1 Etymology
2 First generation (XW10; 1997–2003)
3 Second generation (XW20; 2003–2009)
4 Third generation (XW30; 2009–present)
4.1 Plug-in Hybrid
5 Prius family
6 Sales
7 Design and technology
7.1 EV mode
7.2 Battery
7.3 Battery life cycle
8 Environmental effects
8.1 Lifetime energy usage
8.2 Electromagnetic field levels
8.3 Quietness
9 Marketing and culture
9.1 CO2 advertising
9.2 Political symbolism
10 Government and corporate incentives
11 See also
12 Notes and references
13 External links
Prius is a Latin word meaning "before". According to Toyota, the name was chosen because the Prius was launched before environmental awareness became a mainstream social issue

In February 2011, Toyota asked the public to decide on what the most proper plural form of Prius should be, with choices including Prien, Prii, Prium, Prius, or Priuses. The company says "it will use the most popular choice in its advertisingand on February 20 announced that "Prii" was the most popular choice, and the new official plural designationIn Latin prius is the neuter singular of the comparative form (prior, prior, prius) of an adjective with only comparative and superlative (the superlative being primus, prima, primum), consequently, like all 3rd declension words, the plural in Latin was priora (cf. Latin declension). There is no reason to believe, however, that any majority of English speakers (or even Prius owners) use anything but the regular English plural, Priuses.
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