English
heptasulfide
From hepta- + sulfide.
Proto-Indo-European *septḿ̥ ‘seven’
Proto-Hellenic *heptə́ ‘seven’
Ancient Greek ἑπτά ‘seven’
English hepta-
Today it means
noun Any compound having seven sulfide groups, or seven linked sulfur atoms
Language periods are conventional ranges, not dates for this word.
Etymograph / heptasulfide