mucin

Noun
  1. A nitrogenous substance found in mucous secretions;
    A lubricant that protects body surfaces (synset 114755134)
    is a type of: glycoprotein - a conjugated protein having a carbohydrate component
    substance meronym: mucous secretion, mucus - protective secretion of the mucous membranes; in the gut it lubricates the passage of food and protects the epithelial cells; in the nose and throat and lungs it can make it difficult for bacteria to penetrate the body through the epithelium

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