ogdoad

Ancient Greek ὀγδοάς (ogdoás, “eight, a group of eight”).

• IPA^(key): /ˈɒɡ.dəʊ.æd/

ogdoad (plural ogdoads)

1. A thing made up of eight parts.

   Synonyms: octet, ogdoas

   • 1855, Henry Hart Milman, History of Latin Christianity‎:

     Probably these, as in the other systems, made the second Ogdoad; and these, with other astral influence, borrowed from the Tsabaism of the region, the twelve signs of the zodiac, and the thirty-six Decani

• “ogdoad”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.