Psychiatric disorders are part of the first diseases that received precise clinical descriptions. The result of this long story a certain heterogeneity of terms. Thus, according to current thinking, the same term may designate more entities and many synonyms can coexist to describe the same clinical phenomenon. Based on the major reference works internationally in discipline, DICOSEMIOPSY application includes the definition of more than 300 terms used in psychiatry and a video illustration for key signs and symptoms through skits tours with professional actors . Definitions used in this application are in perfect harmony with the programs and the official media of the first studies and postgraduate medical studies in France.