"prebutton" meaning in English

{
  "forms": [
    {
      "form": "prebuttons",
      "tags": [
        "plural"
      ]
    }
  ],
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      "args": {},
      "expansion": "prebutton (plural prebuttons)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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      "examples": [
        {
          "ref": "1972, Laurence M. Klauber, Rattlesnakes: Their Habits, Life Histories, and Influence on Mankind:",
          "text": "Before concluding the discussion of rattle width, we should make mention of the prebutton, the rattle with which every young snake is born, but which, unlike the true button, is shed and lost with the young snake's first change of skin a week or so after birth.",
          "type": "quote"
        },
        {
          "ref": "2002, Jay M. Savage, The Amphibians and Reptiles of Costa Rica:",
          "text": "All species of rattlesnakes are viviparous and are born with a laterally compressed keratinized prebutton on the tip of the tail. A few days after birth the snake sheds it skin and loses the prebutton, which is replaced by the first rattle segment, or button.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A precursor to a rattle found on newborn rattlesnakes."
      ],
      "id": "en-prebutton-en-noun-RFjUrKCp",
      "links": [
        [
          "rattle",
          "rattle"
        ],
        [
          "rattlesnake",
          "rattlesnake"
        ]
      ]
    }
  ],
  "word": "prebutton"
}

{
  "forms": [
    {
      "form": "prebuttons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "prebutton (plural prebuttons)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1972, Laurence M. Klauber, Rattlesnakes: Their Habits, Life Histories, and Influence on Mankind:",
          "text": "Before concluding the discussion of rattle width, we should make mention of the prebutton, the rattle with which every young snake is born, but which, unlike the true button, is shed and lost with the young snake's first change of skin a week or so after birth.",
          "type": "quote"
        },
        {
          "ref": "2002, Jay M. Savage, The Amphibians and Reptiles of Costa Rica:",
          "text": "All species of rattlesnakes are viviparous and are born with a laterally compressed keratinized prebutton on the tip of the tail. A few days after birth the snake sheds it skin and loses the prebutton, which is replaced by the first rattle segment, or button.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A precursor to a rattle found on newborn rattlesnakes."
      ],
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        [
          "rattle",
          "rattle"
        ],
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          "rattlesnake",
          "rattlesnake"
        ]
      ]
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  "word": "prebutton"
}