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a region of the brain, between the thalamus and the midbrain, that functions as the main control center for the autonomic nervous system by regulating sleep cycles, body temperature, appetite, etc., and that acts as an endocrine gland by producing hormones, including the releasing factors that control the hormonal secretions of the pituitary gland.

Anatomy. the middle part of the diencephalon through which sensory impulses pass to reach the cerebral cortex.

Botany. a receptacle or torus.

Also called thalamium. an apartment for women in an ancient Greek house.