"rhotacization" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "rhotacize",
        "3": "ation"
      },
      "expansion": "rhotacize + -ation",
      "name": "suffix"
    }
  ],
  "etymology_text": "From rhotacize + -ation.",
  "head_templates": [
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      "expansion": "rhotacization (uncountable)",
      "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",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "name": "English terms suffixed with -ation",
          "parents": [],
          "source": "w"
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          "kind": "topical",
          "langcode": "en",
          "name": "Phonology",
          "orig": "en:Phonology",
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            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The act, process, or result of rhotacizing."
      ],
      "id": "en-rhotacization-en-noun-yaAN0dDk",
      "links": [
        [
          "phonology",
          "phonology"
        ],
        [
          "rhotacizing",
          "rhotacize"
        ]
      ],
      "raw_glosses": [
        "(phonology) The act, process, or result of rhotacizing."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonology",
        "sciences"
      ]
    }
  ],
  "word": "rhotacization"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "rhotacize",
        "3": "ation"
      },
      "expansion": "rhotacize + -ation",
      "name": "suffix"
    }
  ],
  "etymology_text": "From rhotacize + -ation.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "rhotacization (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English entries with incorrect language header",
        "English lemmas",
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        "English terms suffixed with -ation",
        "English uncountable nouns",
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        "Pages with entries",
        "en:Phonology"
      ],
      "glosses": [
        "The act, process, or result of rhotacizing."
      ],
      "links": [
        [
          "phonology",
          "phonology"
        ],
        [
          "rhotacizing",
          "rhotacize"
        ]
      ],
      "raw_glosses": [
        "(phonology) The act, process, or result of rhotacizing."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonology",
        "sciences"
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    }
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  "word": "rhotacization"
}