This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The viscous, slippery substance that consists chiefly of mucin, water, cells, and inorganic salts and is secreted as a protective lubricant coating by cells and glands of the mucous membranes.

n. A slippery secretion from the lining of the mucous membranes.

n. A viscid fluid secreted by mucous membranes, which it serves to moisten and protect. It covers the lining membranes of all the cavities which open externally, such as those of the mouth, nose, lungs, intestinal canal, urinary passages, etc.

n. Any other animal fluid of a viscid quality, as the synovial fluid, which lubricates the cavities of the joints; -- improperly so used.

n. A gelatinous or slimy substance found in certain algæ and other plants.

n. A viscid fluid secreted by the mucous membrane of animals. It is characterized by the presence of considerable quantities of mucin. Also called animal mucilage.

n. In botany, gummy matter soluble in water.

n. The slime of fish

n. 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

"This occurs when muscles surrounding the airways tighten and squeeze them and excessive mucus is produced."

secretion   

mucus-glands   

mucosa    mucositis   

leukorrhea    snot    booger    phlegm    sputum    leucorrhoea    rheum   

mucoidal    mucoid    mucous    mucilaginous   

phlegm    pituita    snivel    mucilage   

Lucas    mucous   

saliva    phlegm    bile    urine    secretion    sputum    semen    mucous    goo    mucosa