Jisho

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変形双五角錐
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Wikipedia definition
1. Snub disphenoid​In geometry, the snub disphenoid is one of the Johnson solids (J84). It is a three-dimensional solid that has only equilateral triangles as faces, and is therefore a deltahedron. It is not a regular polyhedron because some vertices have four faces and others have five. It is one of the elementary Johnson solids that do not arise from "cut and paste" manipulations of the Platonic and Archimedean solids. The 92 Johnson solids were named and described by Norman Johnson in 1966.
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