"underascertainment" meaning in English

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  "etymology_text": "From under- + ascertainment.",
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      "expansion": "underascertainment (uncountable)",
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  "lang_code": "en",
  "pos": "noun",
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          "text": "Further, some household contacts with symptoms may not have returned with the contact slip, leading to underascertainment of contacts examined and possible TB cases detected.",
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      "glosses": [
        "Insufficient ascertainment"
      ],
      "id": "en-underascertainment-en-noun-m5~u1CrX",
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          "ascertainment",
          "ascertainment"
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  "word": "underascertainment"
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  ],
  "etymology_text": "From under- + ascertainment.",
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  "lang_code": "en",
  "pos": "noun",
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          "text": "Further, some household contacts with symptoms may not have returned with the contact slip, leading to underascertainment of contacts examined and possible TB cases detected.",
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      ],
      "glosses": [
        "Insufficient ascertainment"
      ],
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          "ascertainment"
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