"سیاهرگ‌ها" meaning in Persian

{
  "forms": [
    {
      "form": "سیاهرگها",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "siyâhrag-hâ",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "noun form",
        "tr": "siyâhrag-hâ"
      },
      "expansion": "سیاهرگها • (siyâhrag-hâ)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Persian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "سیاهرگ"
        }
      ],
      "glosses": [
        "plural of سیاهرگ"
      ],
      "id": "en-سیاهرگ‌ها-fa-noun-U5FDYFgJ",
      "links": [
        [
          "سیاهرگ",
          "سیاهرگ#Persian"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "word": "سیاهرگ‌ها"
}

{
  "forms": [
    {
      "form": "سیاهرگها",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "siyâhrag-hâ",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "noun form",
        "tr": "siyâhrag-hâ"
      },
      "expansion": "سیاهرگها • (siyâhrag-hâ)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Persian entries with incorrect language header",
        "Persian non-lemma forms",
        "Persian noun forms"
      ],
      "form_of": [
        {
          "word": "سیاهرگ"
        }
      ],
      "glosses": [
        "plural of سیاهرگ"
      ],
      "links": [
        [
          "سیاهرگ",
          "سیاهرگ#Persian"
        ]
      ],
      "tags": [
        "form-of",
        "plural"
      ]
    }
  ],
  "word": "سیاهرگ‌ها"
}