The tissue of the upper and lower jaws that surrounds the base of the teeth. Also called gingiva.
Source: NCI Dictionary of Cancer Terms
Caption: Anatomy of the oral cavity. The oral cavity includes the lips, hard palate (the bony front portion of the roof of the mouth), soft palate (the muscular back portion of the roof of the mouth), retromolar trigone (the area behind the wisdom teeth), front two-thirds of the tongue, gingiva (gums), buccal mucosa (the inner lining of the lips and cheeks), and floor of the mouth under the tongue.2006-04-21 Date last modified: 2014-10-28