"monognathid" meaning in English

{
  "forms": [
    {
      "form": "monognathids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "monognathid (plural monognathids)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "parents": [],
          "source": "w"
        },
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Eels",
          "orig": "en:Eels",
          "parents": [
            "Elopomorph fish",
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ichthyology",
          "orig": "en:Ichthyology",
          "parents": [
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any fish in the family Monognathidae, the onejaws."
      ],
      "id": "en-monognathid-en-noun-ivc4wo-s",
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "family",
          "family"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) Any fish in the family Monognathidae, the onejaws."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "monognathid"
}

{
  "forms": [
    {
      "form": "monognathids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "monognathid (plural monognathids)",
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  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English countable nouns",
        "English entries with incorrect language header",
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        "Entries missing English vernacular names of taxa",
        "Entries using missing taxonomic name (family)",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Eels",
        "en:Ichthyology"
      ],
      "glosses": [
        "Any fish in the family Monognathidae, the onejaws."
      ],
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "family",
          "family"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) Any fish in the family Monognathidae, the onejaws."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "monognathid"
}