ogdoad

ogdoad

(ˈɒɡdəʊˌæd) na group of eight[C17: via Late Latin from Greek ogdoos eighth, from oktō eight]

Thesaurus

Noun

1.

ogdoad - the cardinal number that is the sum of seven and one8, eight, eighter, eighter from Decatur, octad, octet, octonary, VIIIdigit, figure - one of the elements that collectively form a system of numeration; "0 and 1 are digits"