The Collaborative International Dictionary of English v.0.48:
Octangular \Oc*tan"gu*lar\, a. [L. octangulus eight-cornered; octo eight + angulus angle.] Having eight angles; eight-angled. -- Oc*tan"gu*lar*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
octangular adj 1: of or relating to or shaped like an octagon [syn: octangular, octagonal]