Noun: abacus (abacuses,abaci) u'ba-kus or a-bu-kus [N. Amer], a-bu-kus [Brit]
- A calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
"Children in some countries still learn basic arithmetic using an abacus"
- A tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave
"The ornate abacus added to the Corinthian column's decorative appeal"
Derived forms: abaci, abacuses
Type of: calculating machine, calculator, tablet
Encyclopedia: Abacus, Paul