abacus

aba·cus

noun \ˈa-bə-kəs, ə-ˈba-\

plural aba·ci\ˈa-bə-ˌsī, -ˌkē; ə-ˈba-ˌkī\ or aba·cus·es

Definition of ABACUS

1

: an instrument for performing calculations by sliding counters along rods or in grooves

2

: a slab that forms the uppermost member or division of the capital of a column

Illustration of ABACUS

Origin of ABACUS

Latin, from Greek abak-, abax, literally, slab

First Known Use: 14th century

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb