ausoniumEtymologyFrom Ancient Greek Αὐσονία (Ausonía, “Italy”) + -ium.ausonium means A rejected name for neptunium. (Ausonium chemical symbol: Ao) Lexicurio rates it Sui generis — a strength score of 88 out of 100.nounA rejected name for neptunium. (Ausonium chemical symbol: Ao)