Definition of "archipallium" []

• The oldest region of the brain's pallium, often considered contiguous with the olfactory cortex, but varying among species. In humans, the archipallium makes up the hippocampus. (noun)

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• "The premise is a cynical, even nihilistic one: people are the sum of their biological impulses, slaves to genes, pheromones, and the archipallium."
• ""What I've done," Esme said, "is to enliven its archipallium or reptilian brain."