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Archimedean solid

one of the 13 solids (semi-regular convex polyhedrons composed of regular polygons meeting in identical vertices, excluding the 5 Platonic solids (which are composed of only one type of polygon) and excluding the prisms and antiprisms)

Pronunciation
/ˌɑrkəˈmidiən ˈsɑləd/
/ˌɑːkɪˈmiːdɪən ˈsɒlɪd/