"nil per os" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nīl",
        "t": "nothing"
      },
      "expansion": "Latin nīl (“nothing”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Latin nīl (“nothing”) + per (“by means of”) + ōs (“mouth”), literally “nothing by mouth”.",
  "head_templates": [
    {
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      "expansion": "nil per os",
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "antonyms": [
        {
          "word": "per os"
        },
        {
          "word": "PO"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Healthcare",
            "Sciences",
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            "All topics",
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          "source": "w"
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      ],
      "examples": [
        {
          "ref": "1971, Diabetes Mellitus: Diagnosis and Treatment, volume 3, American Diabetes Association, page 252:",
          "text": "The initial written orders should include: insulin dosage to be administered as soon as the patient appears nil per os, measure all intake and output, and obtain venous blood for measurement of blood or serum urea nitrogen, glucose, acetone [...] and phosphorus.",
          "type": "quote"
        },
        {
          "ref": "1998 June 22, DeMeo, M et al., “Beneficial effect of a bile acid resin binder on enteral feeding induced diarrhea.”, in The American Journal of Gastroenterology, volume 93, number 6, Elsevier, Abstract:",
          "text": "We evaluated the effect of Colestid on enteral feeding-induced diarrhea in a double-blind placebo-controlled study. Nineteen patients who were nil per os (NPO) for 5 days before initiation of enteral feeding were enrolled in the study and treatment continued for 7 days.",
          "type": "quote"
        },
        {
          "ref": "2021 April 22, Couloures, K. G. and Hertzog, J. H., “Adverse Events: Risk Factors, Predictors, and Outcomes”, in Mason, Keira P., editor, Pediatric Sedation Outside of the Operating Room: A Multispecialty International Collaboration, Springer International Publishing, →ISBN, page 669:",
          "text": "Table 34.3: Nil per os odds ratio",
          "type": "quote"
        }
      ],
      "glosses": [
        "Nothing by mouth: Nothing may be eaten or drunk."
      ],
      "id": "en-nil_per_os-en-phrase-ebMofDgU",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "Nothing",
          "nothing"
        ],
        [
          "mouth",
          "mouth"
        ],
        [
          "eat",
          "eat"
        ],
        [
          "drunk",
          "drink"
        ]
      ],
      "raw_glosses": [
        "(medicine) Nothing by mouth: Nothing may be eaten or drunk."
      ],
      "synonyms": [
        {
          "word": "NPO"
        },
        {
          "word": "nil by mouth"
        }
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "wikipedia": [
        "nil per os"
      ]
    }
  ],
  "word": "nil per os"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nīl",
        "t": "nothing"
      },
      "expansion": "Latin nīl (“nothing”)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Latin nīl (“nothing”) + per (“by means of”) + ōs (“mouth”), literally “nothing by mouth”.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
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      "expansion": "nil per os",
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  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "antonyms": [
        {
          "word": "per os"
        },
        {
          "word": "PO"
        }
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      "categories": [
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        "Pages with 2 entries",
        "Pages with entries",
        "en:Medicine"
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      "examples": [
        {
          "ref": "1971, Diabetes Mellitus: Diagnosis and Treatment, volume 3, American Diabetes Association, page 252:",
          "text": "The initial written orders should include: insulin dosage to be administered as soon as the patient appears nil per os, measure all intake and output, and obtain venous blood for measurement of blood or serum urea nitrogen, glucose, acetone [...] and phosphorus.",
          "type": "quote"
        },
        {
          "ref": "1998 June 22, DeMeo, M et al., “Beneficial effect of a bile acid resin binder on enteral feeding induced diarrhea.”, in The American Journal of Gastroenterology, volume 93, number 6, Elsevier, Abstract:",
          "text": "We evaluated the effect of Colestid on enteral feeding-induced diarrhea in a double-blind placebo-controlled study. Nineteen patients who were nil per os (NPO) for 5 days before initiation of enteral feeding were enrolled in the study and treatment continued for 7 days.",
          "type": "quote"
        },
        {
          "ref": "2021 April 22, Couloures, K. G. and Hertzog, J. H., “Adverse Events: Risk Factors, Predictors, and Outcomes”, in Mason, Keira P., editor, Pediatric Sedation Outside of the Operating Room: A Multispecialty International Collaboration, Springer International Publishing, →ISBN, page 669:",
          "text": "Table 34.3: Nil per os odds ratio",
          "type": "quote"
        }
      ],
      "glosses": [
        "Nothing by mouth: Nothing may be eaten or drunk."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "Nothing",
          "nothing"
        ],
        [
          "mouth",
          "mouth"
        ],
        [
          "eat",
          "eat"
        ],
        [
          "drunk",
          "drink"
        ]
      ],
      "raw_glosses": [
        "(medicine) Nothing by mouth: Nothing may be eaten or drunk."
      ],
      "synonyms": [
        {
          "word": "NPO"
        },
        {
          "word": "nil by mouth"
        }
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "wikipedia": [
        "nil per os"
      ]
    }
  ],
  "word": "nil per os"
}