mucus

Từ điển WordNet v3.1 - WordNet Dictionary

noun

protective secretion of the mucus 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 (Freq. 2)
• Syn:
mucous secretion
• Derivationally related forms:
mucous
• Hypernyms:
secretion
• Hyponyms:
phlegm, sputum, snot, booger, leukorrhea, leucorrhea
• Substance Meronyms:
mucin