nitrogen has definitions from the field of chemistry
1
[ noun ] (chemistry) a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues

Synonyms

atomic_number_7 N

Used in print

(James A. Ibers et al., "Proton magnetic resonance...)

For the low-temperature measurements the sample was cooled by a cold nitrogen gas flow method similar to that of Andrew and Eades .

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