/ Dictionary / Index B basal ganglion: Meaning and Definition of Find definitions for: ba'sal gang'lion Pronunciation: [key] — Anat. Anat. any of several masses of gray matter in each cerebral hemisphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. basal disk basal metabolic rate Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language