Definition

A tool used for counting and calculating, made of a frame with rods and movable beads or counters that can be slid back and forth.

Example

The children used an abacus to learn basic arithmetic operations.

Conversation

Have you ever seen an old abacus before?

Yeah, I remember using one in school for math class.

It's fascinating how they calculated numbers with it.

Totally! It's like a piece of history that really worked.

Synonyms & Antonyms

Root Explanation

Abacus comes from the Latin word 'abacus' (meaning a counting board or table), which in turn derives from the Greek word 'abax' (meaning a board or a flat surface). The word refers to a device used for counting and calculating, typically consisting of a frame with rods and beads.

Memory Tip

Think of a flat surface ('abax') used for counting — that's why an abacus is a tool for calculation.

Visually Confused Words