Magill’s Medical Guide defines eating disorders as "a group of conditions characterized by disordered eating patterns, preoccupation with body size and weight, and distorted body image. Eating disorders can cause serious medical complications and even death. The causes of eating disorders are complex and involve biological, psychological, and societal factors."
Chang, Anne., eds. Magill's Medical Guide. Pasadena, Calif. : Salem Press, 2008. Print.