/ Dictionary / Index A abaciscus: Meaning and Definition of Find definitions for: ab•a•cis•cus Pronunciation: (ab"u-sis'kus, -kis'-), [key] — pl. -cis•ci a small abacus. a tessera. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. abaca abacist Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language