diaper rash: dermatitis of the thighs and buttocks of infants; supposedly caused by ammonia in the urine in the child's diapers
illness: impairment of normal physiological function affecting part or all of an organism
mosaic law: the laws (beginning with the Ten Commandments) that God gave to the Israelites through Moses; it includes many rules of religious observance given in the first five books of the Old Testament (in Judaism these books are called the Torah)