"vulcanologist" meaning in English

{
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        "2": "la",
        "3": "Vulcan"
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      "expansion": "Latin Vulcan",
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  "etymology_text": "Latin Vulcan, Roman god of fire + ologist.",
  "forms": [
    {
      "form": "vulcanologists",
      "tags": [
        "plural"
      ]
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  ],
  "head_templates": [
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      "args": {},
      "expansion": "vulcanologist (plural vulcanologists)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "Scientists",
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            "Human behaviour"
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      ],
      "glosses": [
        "A person who studies volcanos."
      ],
      "id": "en-vulcanologist-en-noun-8MZRoSb7",
      "links": [
        [
          "volcano",
          "volcano"
        ]
      ],
      "related": [
        {
          "word": "vulcanology"
        }
      ],
      "synonyms": [
        {
          "word": "volcanologist"
        }
      ]
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  ],
  "sounds": [
    {
      "ipa": "/ˌvʌl.kə.ˈnɒ.lə.dʒɪst/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "vulcanologist"
}

{
  "etymology_templates": [
    {
      "args": {
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        "2": "la",
        "3": "Vulcan"
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      "expansion": "Latin Vulcan",
      "name": "uder"
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      "args": {
        "1": "en",
        "2": "ologist"
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      "name": "m"
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  "etymology_text": "Latin Vulcan, Roman god of fire + ologist.",
  "forms": [
    {
      "form": "vulcanologists",
      "tags": [
        "plural"
      ]
    }
  ],
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      "args": {},
      "expansion": "vulcanologist (plural vulcanologists)",
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  "lang_code": "en",
  "pos": "noun",
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    {
      "word": "vulcanology"
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        "en:People",
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      "glosses": [
        "A person who studies volcanos."
      ],
      "links": [
        [
          "volcano",
          "volcano"
        ]
      ]
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  ],
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  "synonyms": [
    {
      "word": "volcanologist"
    }
  ],
  "word": "vulcanologist"
}

{
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  "msg": "UNIMPLEMENTED parse_translation_template: t+ {1: 'fr', 2: 'volcanologue', 3: 'm', 4: 'f'}",
  "path": [
    "vulcanologist",
    "t+"
  ],
  "section": "English",
  "subsection": "noun",
  "title": "vulcanologist",
  "trace": ""
}