[1] : The Collaborative International Dictionary of English v.0.48

octagonal \octag"onal\, a.
   having eight sides and eight angles.
   1913 webster

[2] : WordNet (r) 2.0

octagonal
     adj : of or relating to or shaped like an octagon syn: octangular
see also:
octangular 

[3] : Moby Thesaurus II by Grady Ward, 1.0

21 moby thesaurus words for "octagonal":
   decagonal, dodecagonal, dodecahedral, eightfold, eighth,
   heptagonal, hexagonal, hexahedral, icosahedral, octadic,
   octahedral, octal, octan, octaploid, octastyle, octofid, octonary,
   octosyllabic, octuple, pentagonal, pentahedral

Octagonal >> O Words
Octagonal, definition of term: Octagonal
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