abacus
noun
Abacus is a commonly used English word that refers to a manual counting device used for arithmetic calculations. It consists of a frame with rods or wires strung with beads or counters, which are moved to represent numbers and perform calculations. Abacus has been in use for centuries and is still widely used in some parts of the world, particularly in Asia.
Example
- Children in ancient times used the abacus to perform calculations before the advent of modern calculators.
- The merchant relied on his abacus to quickly tally up the day's sales.
- Learning to use the abacus can help develop strong mental math skills in young students.