noun

• A skin disease.
• The flakes of skin that fall off as a result of a skin disease.
• Any crust-like formations on the skin, or in general.
• (figurative) The foul remains of anything adherent.
• (botany) Minute membranous scales on the surface of some leaves, as in the goosefoot.
• (obsolete, slang) A low, mean person.
• A grey bull trout (Salvelinus confluentus).