"abdominal fin" meaning in English

{
  "forms": [
    {
      "form": "abdominal fins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "abdominal fin (plural abdominal fins)",
      "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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          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Animal body parts",
          "orig": "en:Animal body parts",
          "parents": [
            "Body parts",
            "Animals",
            "Body",
            "Anatomy",
            "Lifeforms",
            "Human",
            "Biology",
            "Medicine",
            "All topics",
            "Life",
            "Sciences",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ichthyology",
          "orig": "en:Ichthyology",
          "parents": [
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "One of the posterior paired fins of fishes; pelvic fin; ventral fin."
      ],
      "id": "en-abdominal_fin-en-noun-wfBQNnWi",
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "posterior",
          "posterior"
        ],
        [
          "pelvic fin",
          "pelvic fin"
        ],
        [
          "ventral fin",
          "ventral fin"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) One of the posterior paired fins of fishes; pelvic fin; ventral fin."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/æbˈdɑm.ə.nl̩ fɪn/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/əbˈdɑm.ə.nl̩ fɪn/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "abdominal fin"
}

{
  "forms": [
    {
      "form": "abdominal fins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "abdominal fin (plural abdominal fins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with IPA pronunciation",
        "English terms with non-redundant non-automated sortkeys",
        "en:Animal body parts",
        "en:Ichthyology"
      ],
      "glosses": [
        "One of the posterior paired fins of fishes; pelvic fin; ventral fin."
      ],
      "links": [
        [
          "ichthyology",
          "ichthyology"
        ],
        [
          "posterior",
          "posterior"
        ],
        [
          "pelvic fin",
          "pelvic fin"
        ],
        [
          "ventral fin",
          "ventral fin"
        ]
      ],
      "raw_glosses": [
        "(ichthyology) One of the posterior paired fins of fishes; pelvic fin; ventral fin."
      ],
      "topics": [
        "biology",
        "ichthyology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/æbˈdɑm.ə.nl̩ fɪn/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "/əbˈdɑm.ə.nl̩ fɪn/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "abdominal fin"
}