Relating to or covered with mucus, a slippery secretion produced by glands in the body.
From Latin 'mucus,' possibly related to 'mungere' (to blow the nose). The term entered English in the 1600s as medical and anatomical knowledge expanded during the scientific revolution.
Your body produces about a liter of mucus every single day—it's not gross but actually brilliant engineering, protecting your lungs and digestive system like an internal wetsuit.
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