(definition) by Webster 1913 Wed Dec 22 1999 at 1:53:36

Pen*tag"o*nal (?), a. [Cf. F. pentagonal, pentagone, L. pentagonus, pentagonius, Gr. .]

Having five corners or angles.

Pentagonal dodecahedron. See Dodecahedron, and Pyritohedron.

 

© Webster 1913.

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