Main Entry: lichen pla·nus Pronunciation: -'plA-n&s Function: noun : a skin disease characterized by an eruption of wide flat papules covered by ahorny glazed film, marked by intense itching, and often accompanied by lesions on the oral mucosa
lichen planus lichen pla·nus (plā'nəs) n. A skin condition characterized by the eruption of flat-topped, shiny, violaceous papules on flexor surfaces, male genitalia, and the mucosa of the oral cavity. Also called lichen ruber planus.