"-cline" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*ḱley-",
        "id": "incline"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "-clinal"
      },
      "expansion": "Back-formation from -clinal",
      "name": "back-form"
    }
  ],
  "etymology_text": "Back-formation from -clinal.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "suffix",
        "cat2": "",
        "cat3": "",
        "head": "",
        "id": ""
      },
      "expansion": "-cline",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-cline",
      "name": "en-suffix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English back-formations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A specified form of slope or gradation."
      ],
      "id": "en--cline-en-suffix-uZwHffu3",
      "links": [
        [
          "slope",
          "slope"
        ],
        [
          "gradation",
          "gradation"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-cline"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*ḱley-",
        "id": "incline"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "-clinal"
      },
      "expansion": "Back-formation from -clinal",
      "name": "back-form"
    }
  ],
  "etymology_text": "Back-formation from -clinal.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "suffix",
        "cat2": "",
        "cat3": "",
        "head": "",
        "id": ""
      },
      "expansion": "-cline",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-cline",
      "name": "en-suffix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "English back-formations",
        "English entries with incorrect language header",
        "English lemmas",
        "English suffixes",
        "English terms derived from Proto-Indo-European",
        "English terms derived from the Proto-Indo-European root *ḱley- (incline)"
      ],
      "glosses": [
        "A specified form of slope or gradation."
      ],
      "links": [
        [
          "slope",
          "slope"
        ],
        [
          "gradation",
          "gradation"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-cline"
}