Answer: dodeca

AnswerCrossword Clue
DODECA

Twelve (prefix)

DODECA

3 : tri- :: 12: ...

DODECA

Twice hexa-

DODECA
Prefix for twelve
DODECA
Twelve: Prefix.
DODECATwelve: Prefix
DODECAComb. form for 12
DODECAPrefix with hedron