"πετρο-" meaning in Greek

{
  "forms": [
    {
      "form": "petro-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "πετρο- • (petro-)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "πετρο- • (petro-)",
      "name": "el-prefix"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prefix",
  "related": [
    {
      "_dis1": "0 0",
      "english": "rock",
      "roman": "pétra",
      "tags": [
        "feminine"
      ],
      "word": "πέτρα"
    }
  ],
  "senses": [
    {
      "examples": [
        {
          "text": "πετρο- (petro-) + πέρδικα (pérdika, “partridge”) → πετροπέρδικα (petropérdika, “rock partridge”)",
          "type": "example"
        }
      ],
      "glosses": [
        "expressing a connection with rock(s)"
      ],
      "id": "en-πετρο--el-prefix-spQQQ43T",
      "links": [
        [
          "rock",
          "rock#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Entries with collapsible category trees for nonexistent categories",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "πετρο- (petro-) + γκάζι (gkázi, “gas”) → πετρογκάζ (petrogkáz, “bottled fuel gas”)",
          "type": "example"
        }
      ],
      "glosses": [
        "expressing a connection with oil or petroleum"
      ],
      "id": "en-πετρο--el-prefix-h6wy05rt",
      "links": [
        [
          "oil",
          "oil#English"
        ],
        [
          "petroleum",
          "petroleum#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "roman": "petró-",
      "word": "πετρό-"
    }
  ],
  "word": "πετρο-"
}

{
  "categories": [
    "Entries with collapsible category trees for nonexistent categories",
    "Greek entries with incorrect language header",
    "Greek lemmas",
    "Greek prefixes",
    "Pages using catfix",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "petro-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "πετρο- • (petro-)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "πετρο- • (petro-)",
      "name": "el-prefix"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prefix",
  "related": [
    {
      "english": "rock",
      "roman": "pétra",
      "tags": [
        "feminine"
      ],
      "word": "πέτρα"
    }
  ],
  "senses": [
    {
      "examples": [
        {
          "text": "πετρο- (petro-) + πέρδικα (pérdika, “partridge”) → πετροπέρδικα (petropérdika, “rock partridge”)",
          "type": "example"
        }
      ],
      "glosses": [
        "expressing a connection with rock(s)"
      ],
      "links": [
        [
          "rock",
          "rock#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "πετρο- (petro-) + γκάζι (gkázi, “gas”) → πετρογκάζ (petrogkáz, “bottled fuel gas”)",
          "type": "example"
        }
      ],
      "glosses": [
        "expressing a connection with oil or petroleum"
      ],
      "links": [
        [
          "oil",
          "oil#English"
        ],
        [
          "petroleum",
          "petroleum#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "petró-",
      "word": "πετρό-"
    }
  ],
  "word": "πετρο-"
}