Dictionary

abacus

noun aba·cus \ˈa-bə-kəs, ə-ˈba-\

: a device used for counting and calculating by sliding small balls or beads along rods or in grooves

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

Full 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

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