"sphenacodontian" meaning in English

{
  "forms": [
    {
      "form": "sphenacodontians",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "sphenacodontian (plural sphenacodontians)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "parents": [
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        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Vertebrates",
          "orig": "en:Vertebrates",
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          "name": "Zoology",
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      ],
      "examples": [
        {
          "ref": "2005, Thomas Stainforth Kemp, The Origin and Evolution of Mammals, page 26",
          "text": "The keel of the angular does have the deep form characteristic of the group, but it is not reflected laterally as occurs in other sphenacodontians.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any synapsid of the clade Sphenacodontia."
      ],
      "id": "en-sphenacodontian-en-noun-2HQ9NV4d",
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "synapsid",
          "synapsid"
        ]
      ],
      "raw_glosses": [
        "(zoology) Any synapsid of the clade Sphenacodontia."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "sphenacodontian"
}

{
  "forms": [
    {
      "form": "sphenacodontians",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "sphenacodontian (plural sphenacodontians)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Vertebrates",
        "en:Zoology"
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      "examples": [
        {
          "ref": "2005, Thomas Stainforth Kemp, The Origin and Evolution of Mammals, page 26",
          "text": "The keel of the angular does have the deep form characteristic of the group, but it is not reflected laterally as occurs in other sphenacodontians.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Any synapsid of the clade Sphenacodontia."
      ],
      "links": [
        [
          "zoology",
          "zoology"
        ],
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          "synapsid",
          "synapsid"
        ]
      ],
      "raw_glosses": [
        "(zoology) Any synapsid of the clade Sphenacodontia."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "sphenacodontian"
}