| neon | | |
| n. (substance) | 1. atomic number 10, ne, neon | a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts. |
| ~ 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. |
| ~ argonon, inert gas, noble gas | any of the chemically inert gaseous elements of the helium group in the periodic table. |
| ~ 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" |
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