deca·he·dron /ˌdɛkəˈhidrən/
十面體
Dec·a·he·dron n.; pl. E. Decahedrons L. Decahedra Geom. A solid figure or body inclosed by ten plane surfaces. [Written also, less correctly, decaedron.]
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decahedron
n : any polyhedron having ten plane faces