Psychological Disorders List - Symptoms and Diagnosis. This psychological disorders list and directory has been abbreviated from the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). This manual is the most widely used diagnostic criteria for the classification of psychological disorders. Adjustment Disorders.
pest â(plural pests). ( 1 originally) A plague, pestilence, epidemic. 2  An annoying, harmful, often destructive creature. 3  An annoying person.( 4 Britain, slang) Someone with poor social discipline who continually bothers uninterested women.est â(plural pests). ( 1 originally) A plague, pestilence, epidemic. 2  An annoying, harmful, often destructive creature. 3  An annoying person.
any organism that causes nuisance to man, either economically or medically. Our classification of pests is constantly changing and is very dependent on economic circumstances. For example, the fungus causing apple scab is treated as a pest in the UK because it disfigures the fruit. In poorer countries, however, such cosmetic qualities of apples are less important and the fungus is not considered a pest.