neon

Concise Oxford English Dictionary © 2008 Oxford University Press:
neon/ˈniːɒn/

▶noun

• 1 the chemical element of atomic number 10, an inert gaseous element of the noble gas group. (Symbol: Ne)

• 2 fluorescent lighting and signs using neon or another gas.

  ■ [as modifier] very bright or fluorescent in colour.

– origin C19: from Gk, lit. ‘something new’, neut. of the adj. neos.