Definition of abacus:
- A board, tray, or table, divided into perforated compartments, for holding cups, bottles, or the like; a kind of cupboard, buffet, or sideboard.
- 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.
- A table or tray strewn with sand, anciently used for drawing, calculating, etc.
- A tablet, panel, or compartment in ornamented or mosaic work.
- The uppermost member or division of the capital of a column, immediately under the architrave. See Column.
- "Travels in China, Containing Descriptions, Observations, and Comparisons, Made and Collected in the Course of a Short Residence at the Imperial Palace of Yuen-Min-Yuen, and on a Subsequent Journey through the Country from Pekin to Canton", John Barrow.
Is it a coincidence that the Greeks used an abacus, or counting- board, on which the beads slid up and down in vertical grooves, while on the Chinese counting- board the only difference is that the beads slide up and down on vertical rods?- "China and the Chinese", Herbert Allen Giles.
- "The Hindu-Arabic Numerals", David Eugene Smith Louis Charles Karpinski.