Hypertext Webster Gateway: "psychosis"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Psychosis \Psy*cho"sis\, n. [NL. See {Psycho-}.]
1. Any vital action or activity. --Mivart.
2. (Med.) A disease of the mind; especially, a functional
mental disorder, that is, one unattended with evident
organic changes.
From WordNet (r) 1.7 (wn)
psychosis
n : any severe mental disorder in which contact with reality is
lost or highly distorted
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