What is the meaning of Abacus?

A table or tray scattered with sand which was used for calculating or drawing.

A device used for performing arithmetical calculations; a table on which loose counters are placed, or an instrument with beads sliding on rods, or counters in grooves, with one row of beads or counters representing units, the next tens, etc.

The uppermost portion of the capital of a column immediately under the architrave, in some cases a flat oblong or square slab, in others more decorated.

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

abacus (arithmetic calculation device, usually with beads on rods)

abacus (upper portion of a column's capital)

square board

sideboard

counting board, abacus

gaming board

A painted ceiling or wall panel.

panel

tray

(Late Latin) calculation in general

abacus

Source: wiktionary.org