/ Dictionary / Index B brain cell: Meaning and Definition of Find definitions for: brain' cell" Pronunciation: [key] — Anat. Anat. a neuron in the brain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. braincase brainchild Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language