octonary octonarius • octonematous · · · Info · Definitions · Synonyms · Characters · · octonary · · Text Latin · · Script 8 · · Length Definitions · · · (noun) the cardinal number that is the sum of seven and one. Synonyms: eight, 8, VIII, eighter, eighter from Decatur, octad, ogdoad, 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 ogdoad · · Synonym 7 octet · · Synonym 8 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079