APA Dictionary of Psychology

n. a state characterized by dangerously low levels of vitamins, minerals, and other nutrients (nutritional deficiency) as a result of insufficient food intake or inadequate metabolizatism of food consumed; it is a form of malnutrition. In children, it is associated with underweight, stunted growth, susceptibility to infection, and cognitive deficits that may not be reversible by treatment. It is often seen in lower income individuals and in older adults with neurocognitive disorders who have become incapable of accessing and preparing sufficient food. Also called hyponutrition.