/
sʌɪˈkəʊsɪs/
n.
(pl. psychoses
/-siːz/
)
a mental disorder in which thought and emotions are so impaired that perception of external reality is severely affected.
Etymology
C19: from Gk psukhōsis ‘animation’, from psukhoō ‘I give life to’, from psukhē ‘soul, mind’.