n.
Pronunciation: s ī - ' k ō -s ə s
Function: noun
Inflected Form: plural -cho · ses \ - ˌ s ē z \
Etymology: New Latin
Date: 1847
: fundamental derangement of the mind (as in schizophrenia) characterized by defective or lost contact with reality especially as evidenced by delusions, hallucinations, and disorganized speech and behavior