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Noun atomic number 7 has 1 sense
- nitrogen, N, atomic number 7 - 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
--1 is a kind of chemical element, element; gas
--1 is a substance of air
--1 has particulars: azote; liquid nitrogen
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