1. 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 lasers, as a cryogen, and in cathode-ray tubes and other display devices. Atomic number 10; atomic weight 20.180; melting point -248.59°C; boiling point -246.08°C. See Periodic Table.
2. Electric signage made with neon lights.
3. An extremely bright shade of a color.
4. A neon tetra.
1. Of, relating to, or containing neon.
2. Of or relating to a form of lighting used especially on advertising signs and consisting of glass tubes filled with neon or other gases that emit colored light when subjected to an electric current.
3. Extremely bright or vivid; fluorescent: neon purple.
[From Greek, neuter of neos, new; see newo- in the Appendix of Indo-European roots.]
(click for a larger image)neon
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.