Word.ws English Dictionary

etherion

etherion noun: a gas formerly believed to exist in air, initially identified by Charles F. Brush in 1898. He estimated that its density was one ten-thousandth of hydrogen.

Noun

etherion (countable and uncountable, plural etherions)

  1. (historical) A gas formerly believed to exist in air, initially identified by Charles F. Brush in 1898. He estimated that its density was one ten-thousandth of hydrogen.

Forms of etherion

pluraletherions

Origin of etherion

1898-12, Charles F. Brush, edited by J. Am. Chem. Soc., A new gas., volume 20, page 909: [...] it seems really probable that it not only extends far beyond the atmosphere, but fills all celestial space at a very small pressure. In recognition of this probability, I have provisionally named it aetherion or etherion, meaning “high in the heavens.” From Ancient Greek αἰθέριος (aithérios), from αἰθήρ (aithḗr, “upper heaven”).

Questions about etherion

What does etherion mean?
Etherion means a gas formerly believed to exist in air, initially identified by Charles F. Brush in 1898. He estimated that its density was one ten-thousandth of hydrogen.
What part of speech is etherion?
Etherion is a noun.
What is the plural of etherion?
The plural of etherion is etherions.

Words near etherion in the dictionary

  1. etheriids
  2. etherin
  3. ethering
  4. Etherington
  5. Etheringtons
  6. etherion
  7. etherions
  8. etherisation
  9. etherisations
  10. etherise
  11. etherised

Source and license

Adapted from Wiktionary: etherion (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “etherion.” Word.ws, https://word.ws/etherion. Based on Wiktionary, CC BY-SA 4.0.