n., pl., -ies.
Brain surgery used to treat severe, intractable mental or behavioral disorders.
psychosurgeon psy'cho·sur'geon (-sûr'jən) n.
psychosurgical psy'cho·sur'gi·cal (-jĭ-kəl) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
