"storm glass" meaning in English

{
  "forms": [
    {
      "form": "storm glasses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "storm glass (plural storm glasses)",
      "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"
        }
      ],
      "glosses": [
        "an instrument previously used to predict weather. Consisting of a special liquid placed inside a sealed transparent glass, the state of crystallization within the liquid was believed to be connected to the weather."
      ],
      "id": "en-storm_glass-en-noun-GXIHNfw0",
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "Sturmglas"
        }
      ],
      "wikipedia": [
        "storm glass"
      ]
    }
  ],
  "word": "storm glass"
}

{
  "forms": [
    {
      "form": "storm glasses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "storm glass (plural storm glasses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "an instrument previously used to predict weather. Consisting of a special liquid placed inside a sealed transparent glass, the state of crystallization within the liquid was believed to be connected to the weather."
      ],
      "wikipedia": [
        "storm glass"
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "Sturmglas"
    }
  ],
  "word": "storm glass"
}