/ Dictionary / Index T tuberculum: Meaning and Definition of Find definitions for: tu•ber•cu•lum Pronunciation: (too-bûr'kyu-lum, tyoo-), [key] — pl. -la a tubercle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tuberculous tuber fern Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language