Abacus

Noun

  • A calculating table or frame; an instrument for performing arithmetical calculations by balls sliding on wires, or counters in grooves, the lowest line representing units, the second line, tens, etc. [First attested in the late 17th century.]

    "I've heard merchants still use an abacus for adding things up in China."

  • (obsolete) A table or tray strewn with sand, anciently used for drawing, calculating, etc. [Attested from around 1350 (1387) until around 1470.].
  • A board, tray, or table, divided into perforated compartments, for holding cups, bottles, or the like; a kind of cupboard, buffet, or sideboard. [First attested in the late 18th century.]
  • (architecture) The uppermost portion of the capital of a column, immediately under the architrave. [First attested in the mid 16th century.]

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