labium: a liplike structure that bounds a bodily orifice (especially any of the four labiate folds of a woman's vulva)
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
hydrochlorofluorocarbon: a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere