heptad heptacosane • heptadecane · · · Info · Definitions · Synonyms · Characters · · heptad · · Text Latin · · Script 6 · · Length Definitions · · · (noun) the cardinal number that is the sum of six and one. Synonyms: seven, 7, VII, sevener, septet, septenary. · · Noun Definition 1 Synonyms · · · seven · · Synonym 1 7 · · Synonym 2 vii · · Synonym 3 sevener · · Synonym 4 septet · · Synonym 5 septenary · · Synonym 6 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 p latin small letter p U+0070 t latin small letter t U+0074