"polar stratospheric cloud" meaning in English

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      "expansion": "polar stratospheric cloud (plural polar stratospheric clouds)",
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  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation"
      ],
      "id": "en-polar_stratospheric_cloud-en-noun-t6SmCT2j",
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      "raw_glosses": [
        "(meteorology) A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation"
      ],
      "related": [
        {
          "word": "iridescent cloud"
        }
      ],
      "synonyms": [
        {
          "word": "mother-of-pearl cloud"
        },
        {
          "word": "nacreous cloud"
        }
      ],
      "topics": [
        "climatology",
        "meteorology",
        "natural-sciences"
      ],
      "wikipedia": [
        "polar stratospheric cloud"
      ]
    }
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  "word": "polar stratospheric cloud"
}

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      "form": "polar stratospheric clouds",
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  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "iridescent cloud"
    }
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        "A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation"
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      "raw_glosses": [
        "(meteorology) A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation"
      ],
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        "climatology",
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  "synonyms": [
    {
      "word": "mother-of-pearl cloud"
    },
    {
      "word": "nacreous cloud"
    }
  ],
  "word": "polar stratospheric cloud"
}