anorexia (n.) Look up anorexia at Dictionary.com
1590s, "lack of appetite," Modern Latin, from Greek anorexia, from an-, privative prefix, "without" (see an- (1)) + orexis "appetite, desire," from oregein "to desire, stretch out" (cognate with Latin regere "to keep straight, guide, rule;" see regal). In current use, often short for anorexia nervosa.