abacus
Abacus (noun) means a manual calculating tool made of a frame with rows of sliding beads, used to add, subtract, and perform other arithmetic. Example: “Her grandmother could add up long columns of numbers on an abacus faster than most people with a calculator.”
How to use abacus
Learner’s notesIn plain EnglishA wood-and-bead counting frame used to do arithmetic by hand.
Word forms
- Plural
- abaci, abacuses
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Her grandmother could add up long columns of numbers on an _____ faster than most people with a calculator.
Etymology
From Latin abacus, from Ancient Greek ábax, meaning a slab or board covered in sand for drawing or counting.
Rhymes for abacus
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