"athermancy" meaning in English

{
  "etymology_text": "See athermanous.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "athermancy (uncountable)",
      "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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1862, John Tyndall, \"Further Researches on the Absorption and Radiation of Heat by Gaseous Matter\", Philosophical Transactions, in Contributions to Molecular Physics in the Domain of Radiant Heat (1893), page 106",
          "text": "In fact the very experiments devised to show conductivity proved in a very striking manner the existence of athermancy, or opacity to radiant heat, in the case of a considerable number of gases."
        }
      ],
      "glosses": [
        "Inability to transmit radiant heat; impermeability to heat; the quality of being a good insulator."
      ],
      "id": "en-athermancy-en-noun-NIAZSWEa",
      "links": [
        [
          "insulator",
          "insulator"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "athermancy"
}

{
  "etymology_text": "See athermanous.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "athermancy (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1862, John Tyndall, \"Further Researches on the Absorption and Radiation of Heat by Gaseous Matter\", Philosophical Transactions, in Contributions to Molecular Physics in the Domain of Radiant Heat (1893), page 106",
          "text": "In fact the very experiments devised to show conductivity proved in a very striking manner the existence of athermancy, or opacity to radiant heat, in the case of a considerable number of gases."
        }
      ],
      "glosses": [
        "Inability to transmit radiant heat; impermeability to heat; the quality of being a good insulator."
      ],
      "links": [
        [
          "insulator",
          "insulator"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "athermancy"
}