Dodecagon
Pronunciation : Do*dec"a*gon
Part of Speech : n.
Etymology : [Gr. dod?cagone.] (Geom.)
Definition : Defn: A figure or polygon bounded by twelve sides and containing twelve angles.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder