/ Dictionary / Index T toheroa: Meaning and Definition of Find definitions for: to•he•ro•a Pronunciation: (tō"u-rō'u), [key] — pl. -ro•as, -ro•a. a large marine clam, Amphidesma ventricosum, of waters near New Zealand. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. togue tohubohu Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language