English
heptahexahedral
From hepta- + hexahedral.
Formed from hepta- + hexahedral
Proto-Indo-European *septḿ̥ ‘seven’
Proto-Hellenic *heptə́ ‘seven’
Ancient Greek ἑπτά ‘seven’
English hepta-
Today it means
adj Having seven ranges of faces one above another, each range containing six faces.
Language periods are conventional ranges, not dates for this word.
Etymograph / heptahexahedral