A disorder of the buccal mucosa resembling early leukoplakia, characterized by the presence of filmy opalescence of the mucosa in the early stages to a whitish gray cast with a coarsely wrinkled surface in the later stages, associated with intracellular edema of the spinous or malpighian layer. (Dorland, 27th ed). The disease is oral leukoedema (MONDO_0006880, a Monarch Disease Ontology term). Also known as: leukedema of mouth.