ni|tro|gen

ni|tro|gen
ni|tro|gen «NY truh juhn», noun.
a gas without color, taste, or odor that forms about four-fifths of the air by volume. It is one of the most important chemical elements and is needed for the growth of all plants. Nitrogen is also a necessary part of all animal tissues.
[< French nitrogène < Greek nítron niter + French -gène -gen]

Useful english dictionary. 2012.

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