"artro-" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "ἄρθρον",
        "4": "",
        "5": "a joint"
      },
      "expansion": "Ancient Greek ἄρθρον (árthron, “a joint”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ἄρθρον (árthron, “a joint”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "artro-",
      "name": "head"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 6 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "arthro-"
      ],
      "id": "en-artro--it-prefix-jwQGyghb",
      "links": [
        [
          "arthro-",
          "arthro-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "artro-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "ἄρθρον",
        "4": "",
        "5": "a joint"
      },
      "expansion": "Ancient Greek ἄρθρον (árthron, “a joint”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ἄρθρον (árthron, “a joint”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "artro-",
      "name": "head"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian prefixes",
        "Italian terms derived from Ancient Greek",
        "Pages with 6 entries",
        "Pages with entries"
      ],
      "glosses": [
        "arthro-"
      ],
      "links": [
        [
          "arthro-",
          "arthro-"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "artro-"
}