Colorless, odorless, nonmetallic, gaseous element, symbol Ne, atomic number 10, atomic weight 20.183. It is grouped with the inert gases, is non-reactive, and forms no compounds. It occurs in small quantities in the Earth's atmosphere.
Tubes containing neon are used in electric advertising signs, giving off a fiery red glow; it is also used in lasers. Neon was discovered by Scottish chemist William Ramsay and the Englishman Morris Travers.
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; SYN. Ne, atomic number 10.

1. Of, relating to, or using neon
2. Extremely bright; fluorescent