- Chemistry. a chemically inert gaseous element occurring in small amounts in the earth’s atmosphere, used chiefly in a type of electrical lamp. Symbol: Ne; atomic weight: 20.183; atomic number: 10; density: 0.9002 g/l at 0°C and 760 mm pressure.
- neon lamp.
- a sign or advertising sign formed from neon lamps.
- using or containing the gas neon.
- made of or formed by a neon lamp or lamps: a neon sign.
- of, relating to, or characteristic of a tawdry urban district or of gaudy nighttime entertainment.
- a colourless odourless rare gaseous element, an inert gas occurring in trace amounts in the atmosphere: used in illuminated signs and lights. Symbol: Ne; atomic no: 10; atomic wt: 20.1797; valency: 0; density: 0.899 90 kg/m³; melting pt: –248.59°C; boiling pt: –246.08°C
- (modifier) of or illuminated by neon or neon lampsneon sign
n.1898, coined by its discoverers, Sir William Ramsay and Morris W. Travers, from Greek neon, neuter of neos “new” (see new); so called because it was newly discovered. Neon sign is attested from 1927. n. Symbol Ne
- A rare inert colorless gaseous element that occurs in air and glows reddish orange in an electric discharge. Atomic number 10.
- A rare colorless element in the noble gas group that occurs naturally in extremely small amounts in the atmosphere. It glows reddish orange when electricity passes through it, as in a tube in an electric neon light. Neon is also used for refrigeration. Atomic number 10; atomic weight 20.180; melting point -248.67°C; boiling point -245.95°C. See Periodic Table.