"petroform" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "petro",
        "3": "form"
      },
      "expansion": "petro- + -form",
      "name": "confix"
    }
  ],
  "etymology_text": "petro- + -form",
  "forms": [
    {
      "form": "petroforms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "petroform (plural petroforms)",
      "name": "en-noun"
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  ],
  "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": "English terms prefixed with petro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -form",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A shape or pattern made by arranging large rocks and boulders over a relatively wide area."
      ],
      "id": "en-petroform-en-noun-aSSx5bOT",
      "links": [
        [
          "shape",
          "shape"
        ],
        [
          "pattern",
          "pattern"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "boulder",
          "boulder"
        ]
      ],
      "wikipedia": [
        "petroform"
      ]
    }
  ],
  "word": "petroform"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "petro",
        "3": "form"
      },
      "expansion": "petro- + -form",
      "name": "confix"
    }
  ],
  "etymology_text": "petro- + -form",
  "forms": [
    {
      "form": "petroforms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "petroform (plural petroforms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with petro-",
        "English terms suffixed with -form"
      ],
      "glosses": [
        "A shape or pattern made by arranging large rocks and boulders over a relatively wide area."
      ],
      "links": [
        [
          "shape",
          "shape"
        ],
        [
          "pattern",
          "pattern"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "boulder",
          "boulder"
        ]
      ],
      "wikipedia": [
        "petroform"
      ]
    }
  ],
  "word": "petroform"
}