"boattail" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "boat",
        "3": "tail"
      },
      "expansion": "boat + tail",
      "name": "compound"
    }
  ],
  "etymology_text": "boat + tail",
  "forms": [
    {
      "form": "boattails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "boattail (plural boattails)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The progressively narrowing rear end of a bullet or ballistic missile that is designed to reduce drag"
      ],
      "id": "en-boattail-en-noun-jWAHfujM",
      "links": [
        [
          "narrowing",
          "narrowing"
        ],
        [
          "bullet",
          "bullet"
        ],
        [
          "ballistic missile",
          "ballistic missile"
        ],
        [
          "drag",
          "drag"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "27 73",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
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        {
          "_dis": "28 72",
          "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+disamb"
        },
        {
          "_dis": "25 75",
          "kind": "lifeform",
          "langcode": "en",
          "name": "Icterids",
          "orig": "en:Icterids",
          "parents": [
            "Perching birds",
            "Birds",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A large grackle or blackbird (Quiscalus major), found in the Southern United States."
      ],
      "id": "en-boattail-en-noun-wqiCG3S5",
      "links": [
        [
          "grackle",
          "grackle"
        ],
        [
          "blackbird",
          "blackbird"
        ],
        [
          "United States",
          "United States"
        ]
      ],
      "synonyms": [
        {
          "_dis1": "0 100",
          "sense": "bird",
          "word": "boattail grackle"
        }
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "boat-tail"
    }
  ],
  "word": "boattail"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English entries with topic categories using raw markup",
    "English lemmas",
    "English nouns",
    "en:Icterids"
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  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "boat",
        "3": "tail"
      },
      "expansion": "boat + tail",
      "name": "compound"
    }
  ],
  "etymology_text": "boat + tail",
  "forms": [
    {
      "form": "boattails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "boattail (plural boattails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The progressively narrowing rear end of a bullet or ballistic missile that is designed to reduce drag"
      ],
      "links": [
        [
          "narrowing",
          "narrowing"
        ],
        [
          "bullet",
          "bullet"
        ],
        [
          "ballistic missile",
          "ballistic missile"
        ],
        [
          "drag",
          "drag"
        ]
      ]
    },
    {
      "categories": [
        "Entries using missing taxonomic name (species)"
      ],
      "glosses": [
        "A large grackle or blackbird (Quiscalus major), found in the Southern United States."
      ],
      "links": [
        [
          "grackle",
          "grackle"
        ],
        [
          "blackbird",
          "blackbird"
        ],
        [
          "United States",
          "United States"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "bird",
      "word": "boattail grackle"
    },
    {
      "word": "boat-tail"
    }
  ],
  "word": "boattail"
}