Definitions

1. noun

an ancient calculating device with rows of beads or counters used for arithmetic calculations

“The abacus was used by merchants for centuries before the invention of electronic calculators.”

2. noun

a system or process of calculating or reckoning

“The new abacus of modern accounting has reduced errors significantly.”

3. verb

to calculate or reckon using an abacus

“The accountant abacus the numbers quickly and accurately.”