noun🔗ShareThe region of the human brain, specifically the human forebrain, that includes the thalamus, the hypothalamus, the epithalamus, the prethalamus or subthalamus, and the pretectum."The doctor explained that the patient's memory problems might be linked to damage in the diencephalon, a deep part of the brain responsible for relaying sensory information. "anatomyorganbodymedicinephysiologyChat with AIVocabulary GamePractice Reading