/ Dictionary / Index B basal disk: Meaning and Definition of Find definitions for: ba'sal disk' Pronunciation: [key] — Anat. Anat. the flattened basal surface by which coelenterate polyps attach to the substrate. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. basal conglomerate basal ganglion 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