"meal marker" meaning in English

{
  "forms": [
    {
      "form": "meal markers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "meal marker (plural meal markers)",
      "name": "en-noun"
    }
  ],
  "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"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2013, Thomas F. Schweizer, Christine A. Edwards, Dietary Fibre — A Component of Food: Nutritional Function in Health and Disease, page 188",
          "text": "The incorporation of guar gum into a radiolabelled homogenised meal in rats delayed the delivery of the meal marker from the stomach into the small intestine and also from the small intestine into the colon.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A substance added to food to allow the measurement of how quickly it passes through the segments of the digestive tract."
      ],
      "id": "en-meal_marker-en-noun-e3hQxhGS",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "food",
          "food"
        ],
        [
          "digestive tract",
          "digestive tract"
        ]
      ],
      "raw_glosses": [
        "(medicine) A substance added to food to allow the measurement of how quickly it passes through the segments of the digestive tract."
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "meal marker"
}

{
  "forms": [
    {
      "form": "meal markers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "meal marker (plural meal markers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Medicine"
      ],
      "examples": [
        {
          "ref": "2013, Thomas F. Schweizer, Christine A. Edwards, Dietary Fibre — A Component of Food: Nutritional Function in Health and Disease, page 188",
          "text": "The incorporation of guar gum into a radiolabelled homogenised meal in rats delayed the delivery of the meal marker from the stomach into the small intestine and also from the small intestine into the colon.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A substance added to food to allow the measurement of how quickly it passes through the segments of the digestive tract."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "food",
          "food"
        ],
        [
          "digestive tract",
          "digestive tract"
        ]
      ],
      "raw_glosses": [
        "(medicine) A substance added to food to allow the measurement of how quickly it passes through the segments of the digestive tract."
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "meal marker"
}