"petromyzont" meaning in English

{
  "forms": [
    {
      "form": "petromyzonts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "petromyzont (plural petromyzonts)",
      "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",
            "Entry maintenance"
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          "source": "w"
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          "parents": [],
          "source": "w"
        },
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Jawless fish",
          "orig": "en:Jawless fish",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
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          "source": "w"
        },
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          "kind": "topical",
          "langcode": "en",
          "name": "Zoology",
          "orig": "en:Zoology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of the family Petromyzontidae of northern lampreys."
      ],
      "id": "en-petromyzont-en-noun-A0ldCYaV",
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "Petromyzontidae",
          "Petromyzontidae#Translingual"
        ]
      ],
      "raw_glosses": [
        "(zoology) Any of the family Petromyzontidae of northern lampreys."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "petromyzont"
}

{
  "forms": [
    {
      "form": "petromyzonts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "petromyzont (plural petromyzonts)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "Entries missing English vernacular names of taxa",
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        "en:Jawless fish",
        "en:Zoology"
      ],
      "glosses": [
        "Any of the family Petromyzontidae of northern lampreys."
      ],
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "Petromyzontidae",
          "Petromyzontidae#Translingual"
        ]
      ],
      "raw_glosses": [
        "(zoology) Any of the family Petromyzontidae of northern lampreys."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "petromyzont"
}