"triakis tetrahedron" meaning in English

{
  "forms": [
    {
      "form": "triakis tetrahedra",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "triakistetrahedron",
      "tags": [
        "alternative"
      ]
    }
  ],
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      },
      "expansion": "triakis tetrahedron (plural triakis tetrahedra)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
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          "langcode": "en",
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          "orig": "en:Geometry",
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            "Formal sciences",
            "Sciences",
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      ],
      "glosses": [
        "A Catalan solid with 12 faces."
      ],
      "id": "en-triakis_tetrahedron-en-noun-DVxJeMUq",
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "Catalan solid",
          "Catalan solid"
        ],
        [
          "face",
          "face"
        ]
      ],
      "raw_glosses": [
        "(geometry) A Catalan solid with 12 faces."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "triakis tetrahedron"
}

{
  "forms": [
    {
      "form": "triakis tetrahedra",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "triakistetrahedron",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
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      },
      "expansion": "triakis tetrahedron (plural triakis tetrahedra)",
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    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A Catalan solid with 12 faces."
      ],
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        [
          "geometry",
          "geometry"
        ],
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          "Catalan solid",
          "Catalan solid"
        ],
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        ]
      ],
      "raw_glosses": [
        "(geometry) A Catalan solid with 12 faces."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "triakis tetrahedron"
}