accessory

ac*ces*so*ry

noun

{bc}an object or device that is not essential in itself but adds to the beauty, convenience, or effectiveness of something else

accessory

adjective

{bc}assisting under the orders of another

accessory fruit

noun

{bc}a fruit (such as the apple) of which a conspicuous part consists of tissue other than that of the ripened ovary

accessory nerve

noun

{bc}either of a pair of motor nerves that are the 11th cranial nerves of higher vertebrates, arise from the medulla oblongata and the upper part of the spinal cord, and supply chiefly the pharynx and muscles of the upper chest, back, and shoulders