"-thermy" meaning in English

{
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      "args": {
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      "expansion": "-thermy",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "parents": [
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          "source": "w"
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          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "diathermy"
        },
        {
          "word": "endothermy"
        },
        {
          "word": "homeothermy"
        }
      ],
      "glosses": [
        "heat"
      ],
      "id": "en--thermy-en-suffix-WioO2ao6",
      "links": [
        [
          "heat",
          "heat"
        ]
      ],
      "tags": [
        "morpheme"
      ],
      "translations": [
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "-termia"
        }
      ]
    }
  ],
  "word": "-thermy"
}

{
  "derived": [
    {
      "word": "diathermy"
    },
    {
      "word": "endothermy"
    },
    {
      "word": "homeothermy"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "suffixes"
      },
      "expansion": "-thermy",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English suffixes",
        "English terms with non-redundant non-automated sortkeys",
        "Pages with raw sortkeys",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "heat"
      ],
      "links": [
        [
          "heat",
          "heat"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "translations": [
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "-termia"
    }
  ],
  "word": "-thermy"
}