Definition of palaeologic in US English:

palaeologic

adjective

  • Of, relating to, or characterized by an archaic and pre-rational mode of thought dominated by subjective and emotional associations; (Psychiatry) of, relating to, or characterized by a thought process characterized by an inability to make even simple rational deductions about one's relationship to the world, found typically in schizophrenics.

noun

  • This mode or process of thought.

Origin

1940s. From palaeo- + logic. Compare earlier prelogic [adjective].