Abacus
/ˈæbəkəs/noun
A tool used for making calculations, with rods and movable beads.
In ancient times, merchants used an abacus to add and subtract numbers.
Definition 1 of 2
Pro Tip 1/3Calculation Device
An abacus is an ancient counting device, not a modern calculator.
Back in my grandmother's school, every student had an abacus.
Pro Tip 2/3Physical Interaction
Using an abacus involves manually moving beads; it's tactile.
I learned basic arithmetic by sliding beads on an abacus.
Pro Tip 3/3Historical Importance
The abacus was essential before digital calculators; it's a piece of history.
The museum's math exhibit features an ancient Roman abacus.
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