| nitrogen | | |
| n. (substance) | 1. atomic number 7, n, nitrogen | 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. |
| ~ chemical element, element | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter. |
| ~ azote | an obsolete name for nitrogen. |
| ~ air | a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of.; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air" |
| ~ gas | a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely. |
| ~ liquid nitrogen | nitrogen in a liquid state. |
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