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   Ni·tro·gen

   /ˈnītrəj(ə)n/

   

   noun

   • 1. the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.

   Word Origin late 18th century: from French nitrogène(see niter, -gen).

   Scrabble Points: 9

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   • N

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