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decahedron

noun
🔊/ˌdekəˈhiːdrən/
🔊/ˌdekəˈhiːdrən/
 (geometry几何)
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  1. a solid shape with ten flat sides 十面体compare decagonTopics Colours and Shapesc2
    Word Originearly 19th cent.: from deca- ‘ten’ + -hedron, on the pattern of words such as polyhedron.