ogdoad

[ og-doh-ad ]
/ ˈɒg doʊˌæd /

noun

the number eight.
a group of eight.

Origin of ogdoad

1615–25; < Late Latin ogdoad- (stem of ogdoas) < Greek ogdoás, derivative of ógdoos eighth; see -ad1

British Dictionary definitions for ogdoad

ogdoad
/ (ˈɒɡdəʊˌæd) /

noun

a group of eight

Word Origin for ogdoad

C17: via Late Latin from Greek ogdoos eighth, from oktō eight