"track marks" meaning in English

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      "expansion": "track marks pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
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            "Biology",
            "Healthcare",
            "Sciences",
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          "name": "Pathology",
          "orig": "en:Pathology",
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      ],
      "examples": [
        {
          "text": "When a patient has copious track marks demonstrating severe circulatory system damage, injections are done by drilling into the bone marrow and administering medicine intraosseously."
        }
      ],
      "glosses": [
        "The conspicuous signs of artery and vein damage as a result of chronic intravenous injection of drugs."
      ],
      "id": "en-track_marks-en-noun-HKAL0JwM",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "pathology",
          "pathology"
        ],
        [
          "conspicuous",
          "conspicuous"
        ],
        [
          "sign",
          "sign"
        ],
        [
          "artery",
          "artery"
        ],
        [
          "vein",
          "vein"
        ],
        [
          "damage",
          "damage"
        ],
        [
          "as a result of",
          "as a result of"
        ],
        [
          "chronic",
          "chronic"
        ],
        [
          "intravenous",
          "intravenous"
        ],
        [
          "injection",
          "injection"
        ],
        [
          "drug",
          "drug"
        ]
      ],
      "raw_glosses": [
        "(medicine, pathology) The conspicuous signs of artery and vein damage as a result of chronic intravenous injection of drugs."
      ],
      "tags": [
        "plural",
        "plural-only"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
      ]
    }
  ],
  "word": "track marks"
}

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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "text": "When a patient has copious track marks demonstrating severe circulatory system damage, injections are done by drilling into the bone marrow and administering medicine intraosseously."
        }
      ],
      "glosses": [
        "The conspicuous signs of artery and vein damage as a result of chronic intravenous injection of drugs."
      ],
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          "medicine",
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          "pathology",
          "pathology"
        ],
        [
          "conspicuous",
          "conspicuous"
        ],
        [
          "sign",
          "sign"
        ],
        [
          "artery",
          "artery"
        ],
        [
          "vein",
          "vein"
        ],
        [
          "damage",
          "damage"
        ],
        [
          "as a result of",
          "as a result of"
        ],
        [
          "chronic",
          "chronic"
        ],
        [
          "intravenous",
          "intravenous"
        ],
        [
          "injection",
          "injection"
        ],
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          "drug",
          "drug"
        ]
      ],
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        "(medicine, pathology) The conspicuous signs of artery and vein damage as a result of chronic intravenous injection of drugs."
      ],
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        "plural-only"
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      "topics": [
        "medicine",
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  "word": "track marks"
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