labia minora /lā″bē·ə minˈôrə/ sing. labium minus, two thin folds of skin between the labia majora, extending from the clitoris backward on both sides of the vaginal orifice, ending between it and the labia majora. Anteriorly each labium divides into an upper and a lower division. The upper divisions pass above the clitoris and meet to form the preputium clitoridis. The lower divisions pass beneath the clitoris and unite to form the frenulum of the clitoris. Opposed surfaces of the labia minora contain sebaceous follicles.