The outer layer of an object or organism is the most external part and can be composed of several different components. The term 'outer layer' can refer to the CORTEX (6 letters), which is the outermost layer of the brain, the RIND (4 letters), which is the outer layer of a fruit or vegetable, the HUSK (4 letters), which is the outer layer of a seed, the SKIN (4 letters), which is the outer layer of an animal, the BARK (4 letters), which is the outer layer of a tree, the PEEL (4 letters), which is the outer layer of a citrus fruit, the CRUST (5 letters), which is the outer layer of a pie or other baked goods, the COATING (7 letters), which is a thin layer applied to the surface of an object, the COAT (4 letters), which is a type of clothing, and the VENEER (6 letters), which is a thin layer applied to the surface of wood.