Ausonium

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A rejected name for neptunium. (Ausonium chemical symbol: Ao) obsolete, uncountable

Synonyms

ausenium lanthanum

Etymology

From Ancient Greek Αὐσονία (Ausonía, “Italy”) + -ium.

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