Buccal cavity refers to the space inside the cheeks and lips, between the gums and teeth. It is an important part of the oral cavity where food is initially processed through chewing and mixing with saliva. Synonyms for buccal cavity include oral cavity, mouth, and buccal space. The term can also be referred to as oral vestibule, oral cavity proper, mucobuccal fold, or gingivobuccal sulcus. All these terms are commonly used in dental and medical fields to describe the anatomical structure of the mouth and its surrounding structures. Regardless of the name, understanding the function and anatomy of buccal cavity is crucial for maintaining good oral health.