an inert chemical element, one of the noble gases, that is tasteless, odorless, and colorless, found in small quantities in the earth's atmosphere and used in discharge tubes, gas lasers, bright electrical signs, etc.: symbol, Ne; at. no., 10
See neon in American Heritage Dictionary 4
(nēˈŏnˌ)
noun
Symbol Ne A rare, inert gaseous element occurring in the atmosphere to the extent of 18 parts per million and obtained by fractional distillation of liquid air. It is colorless but glows reddish orange in an electric discharge and is used in display and television tubes. Atomic number 10; atomic weight 20.180; melting point -248.67°C; boiling point -245.95°C. See Table at element.
A neon tetra.
An extremely bright color.
adjective
Extremely bright or vivid; fluorescent: neon purple.