"Baoding ball" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cmn",
        "3": "保定鐵球"
      },
      "expansion": "Partial calque of Mandarin 保定鐵球／保定铁球",
      "name": "partial calque"
    }
  ],
  "etymology_text": "Partial calque of Mandarin 保定鐵球／保定铁球.",
  "forms": [
    {
      "form": "Baoding balls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Baoding ball"
      },
      "expansion": "Baoding ball (plural Baoding balls)",
      "name": "en-noun"
    }
  ],
  "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"
        }
      ],
      "glosses": [
        "A metal ball held and rotated within the hand to improve manual strength or dexterity or to relax the hand."
      ],
      "id": "en-Baoding_ball-en-noun-mGnJ9-Ro",
      "links": [
        [
          "metal",
          "metal"
        ],
        [
          "ball",
          "ball"
        ],
        [
          "hand",
          "hand"
        ],
        [
          "manual",
          "manual"
        ],
        [
          "strength",
          "strength"
        ],
        [
          "dexterity",
          "dexterity"
        ],
        [
          "relax",
          "relax"
        ]
      ]
    }
  ],
  "word": "Baoding ball"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "cmn",
        "3": "保定鐵球"
      },
      "expansion": "Partial calque of Mandarin 保定鐵球／保定铁球",
      "name": "partial calque"
    }
  ],
  "etymology_text": "Partial calque of Mandarin 保定鐵球／保定铁球.",
  "forms": [
    {
      "form": "Baoding balls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Baoding ball"
      },
      "expansion": "Baoding ball (plural Baoding balls)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms derived from Mandarin",
        "English terms partially calqued from Mandarin"
      ],
      "glosses": [
        "A metal ball held and rotated within the hand to improve manual strength or dexterity or to relax the hand."
      ],
      "links": [
        [
          "metal",
          "metal"
        ],
        [
          "ball",
          "ball"
        ],
        [
          "hand",
          "hand"
        ],
        [
          "manual",
          "manual"
        ],
        [
          "strength",
          "strength"
        ],
        [
          "dexterity",
          "dexterity"
        ],
        [
          "relax",
          "relax"
        ]
      ]
    }
  ],
  "word": "Baoding ball"
}