Definition

1. Noun:
   • A manual calculating tool: An abacus is a device used for performing arithmetic calculations by sliding beads or counters along rods or within grooves.
   • An architectural element: In classical architecture, an abacus is a flat slab forming the uppermost part of a column's capital, supporting the architrave.

Examples of Usage

• As a calculating tool:
  • The shopkeeper used an abacus to tally the day's sales.
  • Learning to use an abacus can help children understand basic arithmetic.
• As an architectural feature:
  • The marble column was crowned with a beautifully carved abacus.
  • The design of the Doric capital includes a simple, square abacus.

Advanced Usage

• Historical and educational context: The abacus is often discussed as an early computational device and is still used in some cultures for teaching mathematical concepts.
  • Despite modern computers, the abacus remains a valuable educational tool for visualizing numbers.

Variants and Related Words

• Abaci (n): A traditional plural form of "abacus."
  • The museum displayed abaci from various ancient civilizations.
• Abacist (n, archaic): A person skilled in using an abacus.

Synonyms

• Calculating frame: Another term for an abacus as a tool.
• Counter slab: A descriptive term for the architectural element.

Related Phrases

• To work an abacus: To perform calculations using an abacus.
  • The merchant could work an abacus with astonishing speed.
• Beads on an abacus: Refers to the counters used in the calculation tool.
  • She moved the beads on the abacus to find the sum.

Noun

1. a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
2. a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave