- (n.) A table or tray strewn with sand, anciently used for drawing, calculating, etc.
- (n.) A calculating table or frame; an instrument for performing arithmetical calculations by balls sliding on wires or counters in grooves, the lowest line representing units, the second line, tens, etc. It is still employed in China.
- (n.) The uppermost member or division of the capital of a column, immediately under the architrave. See Column.
- (n.) A tablet, panel or compartment in ornamented or mosaic work.
- (n.) A board, tray or table, divided into perforated compartments, for holding cups, bottles or the like; a kind of cupboard, buffet or sideboard.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). abacus. Retrieved September 20, 2026, from http://smartdefine.org/abacus/definitions/1969502 |
| Chicago | Webster's. 2011. "abacus" http://smartdefine.org/abacus/definitions/1969502 (accessed September 20, 2026). |
| Harvard | Webster's 2011, abacus, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/abacus/definitions/1969502>. |
| MLA | Webster's. "abacus" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/abacus/definitions/1969502> |