dodeca-

American  

especially before a vowel, dodec-.

1. a combining form meaning “twelve,” used in the formation of compound words.

   dodecasyllabic.

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dodeca- British  

combining form

1. indicating twelve

   dodecagon

   dodecahedron

   dodecaphonic

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Etymology

Origin of dodeca-

< Greek dōdeka-, combining form of dōdekás twelve, equivalent to dō- two + -dekas ten

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