"underperfusion" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "perfusion"
      },
      "expansion": "under- + perfusion",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + perfusion",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "underperfusion (uncountable)",
      "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"
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        {
          "kind": "other",
          "name": "English terms prefixed with under-",
          "parents": [],
          "source": "w"
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      ],
      "examples": [
        {
          "ref": "2016 February 6, “The Burden of Provider-Initiated Preterm Birth and Associated Factors: Evidence from the Brazilian Multicenter Study on Preterm Birth (EMIP)”, in PLOS ONE, →DOI",
          "text": "IPD culminates in uteroplacental underperfusion, a phenomenon mediated by many biochemical angiogenic factors and autoimmune response regulators that are associated with its pathophysiology.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "inadequate perfusion"
      ],
      "id": "en-underperfusion-en-noun-gsFonRO9",
      "links": [
        [
          "inadequate",
          "inadequate"
        ],
        [
          "perfusion",
          "perfusion"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "underperfusion"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "perfusion"
      },
      "expansion": "under- + perfusion",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + perfusion",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "underperfusion (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English entries with incorrect language header",
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        "English nouns",
        "English terms prefixed with under-",
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      "examples": [
        {
          "ref": "2016 February 6, “The Burden of Provider-Initiated Preterm Birth and Associated Factors: Evidence from the Brazilian Multicenter Study on Preterm Birth (EMIP)”, in PLOS ONE, →DOI",
          "text": "IPD culminates in uteroplacental underperfusion, a phenomenon mediated by many biochemical angiogenic factors and autoimmune response regulators that are associated with its pathophysiology.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "inadequate perfusion"
      ],
      "links": [
        [
          "inadequate",
          "inadequate"
        ],
        [
          "perfusion",
          "perfusion"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "underperfusion"
}