Psychosis Definition
 sī-kōsĭs 
  psychoses
  
    noun
  
 A major mental disorder in which the personality is very seriously disorganized and contact with reality is usually impaired: psychoses are of two sorts, a) functional (characterized by lack of apparent organic cause, and principally of the schizophrenic, paranoid, or bipolar type), and b) organic (characterized by a pathological organic condition such as brain damage or disease, metabolic disorders, etc.)
 Webster's New World 
Other Word Forms of Psychosis
Noun
Singular:
 psychosisPlural:
 psychosesOrigin of Psychosis
- From psych- +"Ž -osis or from Ancient Greek ψύχωσις (psykhosis, “animation, principle of life"). - From Wiktionary 
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