/ Dictionary / Index T tuboid: Meaning and Definition of Find definitions for: tu•boid Pronunciation: (t'boid, ty'-), [key] — adj. having or approximating a tubular form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tubocurarine tub-thumper Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language