"quadrivelocity" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "quadri",
        "3": "velocity"
      },
      "expansion": "quadri- + velocity",
      "name": "prefix"
    }
  ],
  "etymology_text": "quadri- + velocity",
  "forms": [
    {
      "form": "quadrivelocities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "quadrivelocity (plural quadrivelocities)",
      "name": "en-noun"
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  "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"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with quadri-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of four-velocity"
      ],
      "id": "en-quadrivelocity-en-noun-K44FtaBe",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "four-velocity",
          "four-velocity#English"
        ]
      ],
      "raw_glosses": [
        "(physics) Synonym of four-velocity"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "four-velocity"
        }
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "quadrivelocity"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "quadri",
        "3": "velocity"
      },
      "expansion": "quadri- + velocity",
      "name": "prefix"
    }
  ],
  "etymology_text": "quadri- + velocity",
  "forms": [
    {
      "form": "quadrivelocities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "quadrivelocity (plural quadrivelocities)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with quadri-",
        "en:Physics"
      ],
      "glosses": [
        "Synonym of four-velocity"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "four-velocity",
          "four-velocity#English"
        ]
      ],
      "raw_glosses": [
        "(physics) Synonym of four-velocity"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
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          "word": "four-velocity"
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      "topics": [
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    }
  ],
  "word": "quadrivelocity"
}