noun
: a ration furnishing the necessary energy but lacking in one or more accessory food substances (as vitamins) that may be added in varying proportion for the study of their effects
noun
: a ration furnishing the necessary energy but lacking in one or more accessory food substances (as vitamins) that may be added in varying proportion for the study of their effects
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012