"ballrace" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ball",
        "3": "race"
      },
      "expansion": "ball + race",
      "name": "compound"
    }
  ],
  "etymology_text": "ball + race",
  "forms": [
    {
      "form": "ballraces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ballrace (plural ballraces)",
      "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 friction-reducing device consisting of a ring containing freely-revolving ball bearings"
      ],
      "id": "en-ballrace-en-noun-1vOYzXHv",
      "links": [
        [
          "ring",
          "ring"
        ],
        [
          "ball bearing",
          "ball bearing"
        ]
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "Laufring"
        }
      ]
    }
  ],
  "word": "ballrace"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ball",
        "3": "race"
      },
      "expansion": "ball + race",
      "name": "compound"
    }
  ],
  "etymology_text": "ball + race",
  "forms": [
    {
      "form": "ballraces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ballrace (plural ballraces)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "A friction-reducing device consisting of a ring containing freely-revolving ball bearings"
      ],
      "links": [
        [
          "ring",
          "ring"
        ],
        [
          "ball bearing",
          "ball bearing"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "Laufring"
    }
  ],
  "word": "ballrace"
}