"protoplanetary nebula" meaning in English

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  "etymology_text": "From proto- + planetary nebula.",
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      "form": "protoplanetary nebulae",
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  "lang_code": "en",
  "pos": "noun",
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        "A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula."
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        "(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula."
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          "word": "protoplanetary disk"
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        {
          "word": "preplanetary nebula"
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          "sense": "stage in stellar evolution",
          "word": "esiplanetaarinen sumu"
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          "lang_code": "pl",
          "sense": "stage in stellar evolution",
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            "feminine"
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          "word": "mgławica protoplanetarna"
        }
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  ],
  "word": "protoplanetary nebula"
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  "pos": "noun",
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        "(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula."
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  "synonyms": [
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      "code": "fi",
      "lang": "Finnish",
      "lang_code": "fi",
      "sense": "stage in stellar evolution",
      "word": "esiplanetaarinen sumu"
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  "word": "protoplanetary nebula"
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