leucine leucine aminopeptidase leucine-enkephalin leucinoses leucinosis leucinosises leucinuria leucoagglutinin leucoblast leucoblastosis leucocidin leucocyte leucocythaemia leucocytic leucocytogenesis leucocytoid leucocytosis leucocytotic leucocytozoa leucocytozoon leucocytozoonoses leucocytozoonosis leucoderma leucodystrophy leucoencephalitis leucoencephalopathy leucokeratosis leucoma leucomaine leuconostoc leuconychia leucopenia