"agnath" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ἀ-",
        "4": "",
        "5": "without"
      },
      "expansion": "Ancient Greek ἀ- (a-, “without”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Agnatha, from Ancient Greek ἀ- (a-, “without”) + γνάθος (gnáthos, “jaw”).",
  "forms": [
    {
      "form": "agnaths",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "agnath (plural agnaths)",
      "name": "en-noun"
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  ],
  "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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          "kind": "other",
          "name": "English terms with alpha privatives",
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          "source": "w"
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          "source": "w"
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          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "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"
          ],
          "source": "w"
        },
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          "kind": "topical",
          "langcode": "en",
          "name": "Zoology",
          "orig": "en:Zoology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1979, Stephen C. Wood, Evolution of Respiratory Processes, Marcel Dekker,, →ISBN, page 218:",
          "text": "Evolution of vertebrates was accompanied by a gradual increase in oxygen availability, from the irrespirable atmosphere of the Precambrian to a PO₂ at 7 mmHg with the first vertebrates (agnaths), to the present sea level PO₂ value of 160 mmHg with the first reptiles.",
          "type": "quote"
        },
        {
          "ref": "1996, George Christopher Williams, Adaptation and Natural Selection, Princeton University Press,, →ISBN, page 51:",
          "text": "The gnathostomes almost entirely replaced the agnaths, presumably because they were more effective fishes.",
          "type": "quote"
        },
        {
          "ref": "2002, Harold J. Morowitz, The Emergence of Everything, Oxford University Press, →ISBN, page 113:",
          "text": "Thus, although tunicates are presumably intermediate between flatworms and agnaths, the larval tunicate more closely resembles the flatworm and adult agnath.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An agnathan."
      ],
      "id": "en-agnath-en-noun-Z3Ti58qi",
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "agnathan",
          "agnathan"
        ]
      ],
      "raw_glosses": [
        "(zoology) An agnathan."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "sounds": [
    {
      "enpr": "ăgʹnəth"
    },
    {
      "ipa": "/ˈæɡ.nəθ/"
    }
  ],
  "word": "agnath"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "ἀ-",
        "4": "",
        "5": "without"
      },
      "expansion": "Ancient Greek ἀ- (a-, “without”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Agnatha, from Ancient Greek ἀ- (a-, “without”) + γνάθος (gnáthos, “jaw”).",
  "forms": [
    {
      "form": "agnaths",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "agnath (plural agnaths)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
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        "en:Jawless fish",
        "en:Zoology"
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      "examples": [
        {
          "ref": "1979, Stephen C. Wood, Evolution of Respiratory Processes, Marcel Dekker,, →ISBN, page 218:",
          "text": "Evolution of vertebrates was accompanied by a gradual increase in oxygen availability, from the irrespirable atmosphere of the Precambrian to a PO₂ at 7 mmHg with the first vertebrates (agnaths), to the present sea level PO₂ value of 160 mmHg with the first reptiles.",
          "type": "quote"
        },
        {
          "ref": "1996, George Christopher Williams, Adaptation and Natural Selection, Princeton University Press,, →ISBN, page 51:",
          "text": "The gnathostomes almost entirely replaced the agnaths, presumably because they were more effective fishes.",
          "type": "quote"
        },
        {
          "ref": "2002, Harold J. Morowitz, The Emergence of Everything, Oxford University Press, →ISBN, page 113:",
          "text": "Thus, although tunicates are presumably intermediate between flatworms and agnaths, the larval tunicate more closely resembles the flatworm and adult agnath.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An agnathan."
      ],
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "agnathan",
          "agnathan"
        ]
      ],
      "raw_glosses": [
        "(zoology) An agnathan."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "sounds": [
    {
      "enpr": "ăgʹnəth"
    },
    {
      "ipa": "/ˈæɡ.nəθ/"
    }
  ],
  "word": "agnath"
}