pen·tag·o·nal /pɛnˈtægənḷ/
(a.)五角的,五邊形的
Pen·tag·o·nal a. Having five corners or angles.
Pentagonal dodecahedron. See Dodecahedron, and Pyritohedron.
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pentagonal
adj : of or relating to or shaped like a pentagon [syn: pentangular]