/ Dictionary / Index S split-brain: Meaning and Definition of Find definitions for: split-brain Pronunciation: (split'brān'), [key] — adj. having, involving, or pertaining to a severed corpus callosum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. split split decision Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language