1. (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.

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

3. (n.) A gelatinous or slimy substance found in certain algae and other plants.

albumen antifriction autacoid batter bile black lead bonnyclabber butter carrion chalone chyle clabber colostrum cornstarch corruption cream curd dandruff decay digestive secretion discharge dough egg white endocrine excrement filth foul matter furfur gall gangrene gastric juice gaum gel gelatin glair gleet glop glue gluten glycerin goo gook goop graphite gruel gumbo gunk hormone humor ichor intestinal juice jam jell jelly lachryma lactation leukorrhea loblolly lubricant lubricating oil lubricator lymph matter mess milk molasses mucilage muck mucor obscenity ordure pancreatic juice pap paste peccant humor phlegm plumbago porridge prostatic fluid pudding pulp puree purulence pus putrid matter putty rheum rob rot saliva salivary secretion sanies scurf scuz semen semifluid semiliquid serous fluid serum silicone size slime smut snot sordes soup sperm starch sticky mess suppuration sweat syrup tear teardrop tears the whites thyroxin treacle urine wax