ogdoad Ogcocephalus • ogdoas · · · Info · Definitions · Synonyms · Characters · · ogdoad · · Text Latin · · Script 6 · · Length Definitions · · · (noun) the cardinal number that is the sum of seven and one. Synonyms: eight, 8, VIII, eighter, eighter from Decatur, octad, octonary, octet. · · Noun Definition 1 Synonyms · · · eight · · Synonym 1 8 · · Synonym 2 viii · · Synonym 3 eighter · · Synonym 4 eighter from decatur · · Synonym 5 octad · · Synonym 6 octonary · · Synonym 7 octet · · Synonym 8 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 g latin small letter g U+0067 o latin small letter o U+006F