buc·cal \ˈbəkəl\adjective Etymology: Latin bucca cheek + English -al 1.of an oral structure: directed toward the cheek < the buccal aspect of the gum > 2.: of, relating to, or involving the cheeks < a large buccal ganglion > 3.: of, relating to, involving, or lying within the mouth : oral < buccal organs > < a strong buccal capsule >