Definition of peduncle

• n. - The stem or stalk that supports the flower or fruit of a plant, or a cluster of flowers or fruits.
• n. - A sort of stem by which certain shells and barnacles are attached to other objects. See Illust. of Barnacle.
• n. - A band of nervous or fibrous matter connecting different parts of the brain; as, the peduncles of the cerebellum; the peduncles of the pineal gland.