Dietetical :: Dietetical (a.) Of or performance to diet, or to the rules for regulating the kind and quantity of food to be eaten..
 
	
	Dietetics :: Dietetics (n.) That part of the medical or hygienic art which relates to diet or food; rules for diet.
 
	Dietetist :: Dietetist (n.) A physician who applies the rules of dietetics to the cure of diseases.