"-derm" meaning in English

{
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      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*der-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "δέρμα",
        "t": "skin"
      },
      "expansion": "Ancient Greek δέρμα (dérma, “skin”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Ancient Greek δέρμα (dérma, “skin”).",
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        "cat2": "",
        "cat3": "",
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      "expansion": "-derm",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-derm",
      "name": "en-suffix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
        }
      ],
      "glosses": [
        "skin or covering"
      ],
      "id": "en--derm-en-suffix-B3r-0WQq",
      "links": [
        [
          "skin",
          "skin"
        ],
        [
          "covering",
          "covering"
        ]
      ],
      "related": [
        {
          "word": "-derma"
        },
        {
          "word": "-dermatous"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-derm"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*der-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "δέρμα",
        "t": "skin"
      },
      "expansion": "Ancient Greek δέρμα (dérma, “skin”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Ancient Greek δέρμα (dérma, “skin”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "suffix",
        "cat2": "",
        "cat3": "",
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      "expansion": "-derm",
      "name": "head"
    },
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      "args": {},
      "expansion": "-derm",
      "name": "en-suffix"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "related": [
    {
      "word": "-derma"
    },
    {
      "word": "-dermatous"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English suffixes",
        "English terms borrowed from Ancient Greek",
        "English terms derived from Ancient Greek",
        "English terms derived from Proto-Indo-European",
        "English terms derived from the Proto-Indo-European root *der-"
      ],
      "glosses": [
        "skin or covering"
      ],
      "links": [
        [
          "skin",
          "skin"
        ],
        [
          "covering",
          "covering"
        ]
      ],
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        "morpheme"
      ]
    }
  ],
  "word": "-derm"
}