What does "geocoronium" mean?

A hypothetical gaseous chemical element proposed to explain certain spectroscopic lines, and the green glow, found in the polar aurorae, that was later found to be explained by singly-ionized oxygen.

What is a synonym for "geocoronium"?

Common synonyms include: coronium, nebulium.

Geocoronium

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A hypothetical gaseous chemical element proposed to explain certain spectroscopic lines, and the green glow, found in the polar aurorae, that was later found to be explained by singly-ionized oxygen. obsolete, uncountable

Synonyms

All synonyms

coronium nebulium

Etymology

From geo- + corona + -ium, coined by Alfred Wegener in 1911.

Related phrases

chemical element

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.