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.
The buccal space (also termed the buccinator space) is a fascial space of the head and neck (sometimes also termed fascial spaces or tissue spaces).It is a potential space in the cheek, and is paired on each side.The buccal space is superficial to the buccinator muscle and deep to the platysma muscle and the skin.he buccal space is superficial to the buccinator muscle and deep to the platysma muscle and the skin.