English

heptamanganese

From hepta- + manganese.

Proto-Indo-European *septḿ̥ ‘seven’

Proto-Hellenic *heptə́ ‘seven’

Ancient Greek ἑπτά ‘seven’

French manganèse

Today it means

noun Seven atoms of manganese in a chemical compound. Mg₇

Language periods are conventional ranges, not dates for this word.

Etymograph / heptamanganese