/ Dictionary / Index B bicollateral: Meaning and Definition of Find definitions for: bi•col•lat•er•al Pronunciation: (bī"ku-lat'ur-ul), [key] — adj. Bot. (of a bundle) having the xylem lined with phloem on both its inner and outer faces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bicol bicolor Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language