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Adjective: hysterical  hi'ste-ri-kul
  1. Characterized by or arising from psychoneurotic hysteria
    "hysterical amnesia"; "during hysterical conditions various functions of the human body are disordered";
    - hysteric
  2. Marked by excessive or uncontrollable emotion
    "hysterical laughter"; "a mob of hysterical vigilantes"

See also: agitated, neurotic, psychoneurotic

Encyclopedia: Hysterical