1. A table
strewn with sand, anciently used for drawing, calculating, etc.
2. 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.
3. The uppermost member
of the capital of a column, immediately under
the architrave. See Column. A tablet, panel, or compartment
in ornamented or mosaic
4. A board, tray, or table, divided into perforated
compartments, for holding cups, bottles, or the like; a kind
of cupboard, buffet, or sideboard. Abacus harmonicus, an ancient diagram
showing the structure and disposition
of the keys of an instrument.
Origin: L. Abacus, abax, Gr.
Source: Websters Vocabulary