"molecular cloud" meaning in English

{
  "forms": [
    {
      "form": "molecular clouds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "molecular cloud (plural molecular clouds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astrophysics",
          "orig": "en:Astrophysics",
          "parents": [
            "Astronomy",
            "Physics",
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "intergalactic cloud"
        },
        {
          "word": "solar nebula"
        },
        {
          "word": "dark nebula"
        },
        {
          "word": "absorption nebula"
        },
        {
          "word": "Herbig-Haro object"
        }
      ],
      "glosses": [
        "A large and relatively dense cloud of cold gas and dust in interstellar space from which new stars are formed"
      ],
      "hypernyms": [
        {
          "word": "nebula"
        },
        {
          "word": "interstellar cloud"
        }
      ],
      "id": "en-molecular_cloud-en-noun-h3npxGqe",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "gas",
          "gas"
        ],
        [
          "dust",
          "dust"
        ],
        [
          "interstellar",
          "interstellar"
        ],
        [
          "space",
          "space"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A large and relatively dense cloud of cold gas and dust in interstellar space from which new stars are formed"
      ],
      "related": [
        {
          "word": "molecular core"
        }
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "large dense cloud in space",
          "word": "molekyylipilvi"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "large dense cloud in space",
          "tags": [
            "feminine"
          ],
          "word": "Molekülwolke"
        }
      ],
      "wikipedia": [
        "molecular cloud"
      ]
    }
  ],
  "word": "molecular cloud"
}

{
  "coordinate_terms": [
    {
      "word": "intergalactic cloud"
    },
    {
      "word": "solar nebula"
    },
    {
      "word": "dark nebula"
    },
    {
      "word": "absorption nebula"
    },
    {
      "word": "Herbig-Haro object"
    }
  ],
  "forms": [
    {
      "form": "molecular clouds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "molecular cloud (plural molecular clouds)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "nebula"
    },
    {
      "word": "interstellar cloud"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "molecular core"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Astronomy",
        "en:Astrophysics"
      ],
      "glosses": [
        "A large and relatively dense cloud of cold gas and dust in interstellar space from which new stars are formed"
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "gas",
          "gas"
        ],
        [
          "dust",
          "dust"
        ],
        [
          "interstellar",
          "interstellar"
        ],
        [
          "space",
          "space"
        ],
        [
          "star",
          "star"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A large and relatively dense cloud of cold gas and dust in interstellar space from which new stars are formed"
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "molecular cloud"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "large dense cloud in space",
      "word": "molekyylipilvi"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "large dense cloud in space",
      "tags": [
        "feminine"
      ],
      "word": "Molekülwolke"
    }
  ],
  "word": "molecular cloud"
}