Mathematics. the identity element of a group in which the operation is addition. (of a function, especially of a function of a complex variable) a point at which a given function, usually a function of a complex variable, has the value zero; a root.
Mucosa buccalis. The inner lining of the cheeks and lips, which is an anatomic region that includes all the mucous membrane lining of the inner surface of the cheeks and lips, from the line of contact of the opposing lips to the line of attachment of mucosa to the alveolar ridges and pterygomandibular raphe, which occupies an area of 50â60 cm2.
A buccal exostosis is the formation of an exostosis (bone mass) on the outer, cheek-facing side of the maxilla (upper jaw) just above the teeth or the cheek-facing side of the mandible (lower jaw).They are less common on the lower jaw. They begin to develop in early adulthood and may very slowly enlarge over years. buccal exostosis is the formation of an exostosis (bone mass) on the outer, cheek-facing side of the maxilla (upper jaw) just above the teeth or the cheek-facing side of the mandible (lower jaw).