/ Dictionary / Index B bootlace worm: Meaning and Definition of Find definitions for: boot'lace worm" Pronunciation: [key] a brownish-black, ribbonlike nemertean, Lineus longissimus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bootlace Bootle 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