abacus (άβακας, אבקוס)
1. Latin-Greek-Hebrew. Architectural term referring to a flat slab on top of a capital, i.e. the uppermost part of a column. 回
2. Latin-Greek-Hebrew. A device for making mathematical calculations, especially in
the past. It consists of an usually wooden frame with bars along which beads are
slid for calculating (fig.).
In Latin such a bead is called a calculus, meaning a ‘small stone’. Hence, the
etymological origin of the word ‘calculator’. Sometimes spelled abacas. See also