资料来源 : pyDict

八边形的,八角形的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Octagonal \Oc*tag"o*nal\, a.
   Having eight sides and eight angles.

资料来源 : WordNet®

octagonal
     adj : of or relating to or shaped like an octagon [syn: {octangular}]