English
heptaselenide
From hepta- + selenide.
A compound of hepta- + selenide
Proto-Indo-European *septḿ̥ ‘seven’
Proto-Hellenic *heptə́ ‘seven’
Ancient Greek ἑπτά ‘seven’
English hepta-
Today it means
noun any selenide containing seven selenium atoms in each molecule
Language periods are conventional ranges, not dates for this word.
Etymograph / heptaselenide