abaci

A student uses abaci to solve a math problem.

Definition

1. Noun (plural form of ):
   • Counting devices: "abaci" refers to multiple ancient calculating tools consisting of a frame with rods or grooves and sliding beads, used for arithmetic calculations.
   • Architectural elements: In architecture, "abaci" are the plural of abacus, meaning the flat slab forming the top of a column capital.

Usage Examples

• Counting devices:

  • The classroom had several abaci for teaching basic addition and subtraction. (Multiple counting frames used by students.)
  • Merchants in ancient markets used abaci to tally their goods quickly. (Multiple hand-operated calculators.)

• Architectural elements:

  • The columns of the temple featured ornate abaci carved from marble. (The flat tops of the column capitals were decorated.)

Advanced Usage

• "to use abaci": to operate or employ abacuses for calculation.

  • In traditional schools, children learned to use abaci before calculators were available. (They practiced manual arithmetic with these tools.)

• "abaci in architecture": the decorative or structural tops of columns.

  • The Roman architect specified the dimensions of the abaci to match the building's proportions. (The column capitals were designed to fit the overall style.)

Variants and Related Words

• Abacus (n, singular): the singular form; one counting device or one column top.

  • He bought an abacus for his son to learn math. (A single frame with beads.)

• Abacuses (n, alternative plural): an acceptable alternative plural form of abacus.

  • The museum displayed ancient abacuses from China and Greece. (Multiple counting tools.)

• Abacinate (adj): not a standard word; do not confuse with abaci.

Synonyms

• Calculators: devices for performing mathematical operations (modern equivalent).
• Counting frames: descriptive term for abaci used in education.
• Column capitals: architectural term for the top part of a column, which includes the abacus.

Related Idioms

• No common idioms directly use "abaci" as it is a technical plural noun. However, the singular form appears in:
  • "To work an abacus": to perform calculations using an abacus.

    • The accountant worked an abacus faster than a modern calculator. (He used the manual tool efficiently.)

Phrasal Verbs

• No phrasal verbs are formed with "abaci" because it is a noun. Related verb phrases:
  • "To count on an abacus": to use an abacus for counting.

    • She counted the beads on the abaci to verify the total. (She used multiple abacuses for accuracy.)