"gréco-" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Ancient Greek",
      "name": "uder"
    },
    {
      "args": {
        "1": "fr",
        "2": "la",
        "3": "Graecus"
      },
      "expansion": "Latin Graecus",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek via Latin Graecus.",
  "head_templates": [
    {
      "args": {},
      "expansion": "gréco-",
      "name": "fr-prefix"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Greco-"
      ],
      "id": "en-gréco--fr-prefix-U~VubWL8",
      "links": [
        [
          "Greco-",
          "Greco-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "gréco-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Ancient Greek",
      "name": "uder"
    },
    {
      "args": {
        "1": "fr",
        "2": "la",
        "3": "Graecus"
      },
      "expansion": "Latin Graecus",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek via Latin Graecus.",
  "head_templates": [
    {
      "args": {},
      "expansion": "gréco-",
      "name": "fr-prefix"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French lemmas",
        "French prefixes",
        "French terms derived from Ancient Greek",
        "French terms derived from Latin",
        "French undefined derivations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Greco-"
      ],
      "links": [
        [
          "Greco-",
          "Greco-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "gréco-"
}