ABACUS

noun a tablet, panel, or compartment in ornamented or mosaic work.

2. abacus ·noun a table or tray strewn with sand, anciently used for drawing, calculating, ·etc.

3. abacus ·noun the uppermost member or division of the capital of a column, immediately under the architrave. ·see column.

4. abacus ·noun a board, tray, or table, divided into perforated compartments, for holding cups, bottles, or the like; a kind of cupboard, buffet, or sideboard.

5. abacus ·noun 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.