abacus

noun

aba·cus | \ ˈa-bə-kəs

How to pronounce abacus (audio)

, ə-ˈba-

How to pronounce abacus (audio)

\

plural abaci\ ˈa-bə-ˌsī

How to pronounce abacus (audio)

, -ˌkē ; ə-ˈba-ˌkī

How to pronounce abacus (audio)

\ or abacuses

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

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Probably of Babylonian origin, an abacus is a calculating instrument that uses beads that slide along a series of wires or rods set in a frame to represent the decimal places. It is the ancestor of the modern digital calculator. Used by merchants in the Middle Ages throughout Europe and the Arabic world, it was gradually replaced by arithmetic based on Hindu-Arabic numerals. Though rarely used in Europe past the 18th century, it is still used in the Middle East, China, and Japan.

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Cite this Entry

“Abacus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/abacus. Accessed 8 Aug. 2022.

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More Definitions for abacus

abacus

noun

aba·cus | \ ˈa-bə-kəs

\

plural abaci\ ˈa-bə-ˌsī \ or abacuses

Kids Definition of abacus

: an instrument for doing arithmetic by sliding counters along rods or in grooves

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