"duodecimal number system"^^ . . "a positional system of numeration that uses duodecimal digits and a radix of twelve"@en-us . . . . "duodecimal system"@en-us . "0"^^ . . . . "106811109"^^ . . "duodecimal number system"@en-us . "06811109-n"^^ . "0"^^ . .