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.
A pest is a plant or animal detrimental to humans or human concerns (as agriculture or livestock production); alternative meanings include organisms that cause nuisance and epidemic disease associated with high mortality (specifically: plague).In its broadest sense, a pest is a competitor of humanity.In the past, the term might have been used for detrimental animals only, thus for example, causing confusion where the generic term  pesticide  meant  insecticide  to some people.ny prolific animal or plant may be considered pests. Thus in contrast, to the single term pest, in composite terms, e.g. plant pest, agricultural pest livestock pest, the emphasis is always on the organisms or ecosystems infested and affected.