Where does “Atomium” come from?

Atomium (Latin) comes from Latin atomus, from Ancient Greek ἄτομος, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

Ancestry of “Atomium”, step by step

Atomium traces back through two separate lines of ancestry.

via Latin atomus

StepLanguageWordMeaning
1Latinatomusindivisible; an atom, particle incapable of being...
2Ancient Greekἄτομοςuncut; indivisible, not capable of being...
3Ancient Greekἀ-The alpha privativum, used to make words that...
4Proto-Hellenichə-same; together
5Proto-Indo-Europeansm̥-one; with, together
6Proto-Indo-Europeansem-together, one

via Latin aluminium

StepLanguageWordMeaning
1Latinaluminiumaluminium
2Latinalūmenalum
3English-ium1997, Bryan Pfaffenberger, "Official Microsoft...
4Latin-umnominative neuter singular of -us; accusative...
5Proto-Italic*-om
6Proto-Indo-European*-oHom
Every word from Proto-Indo-European sem-Every word from Ancient Greek ἀ-Every word from Ancient Greek ἄτομος