/ Dictionary / Index A abacist: Meaning and Definition of Find definitions for: ab•a•cist Pronunciation: (ab'u-sist), [key] — n. a person skilled in using an abacus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. abaciscus aback Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language