abacus, n.
(abaci)
(abaci)
a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
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abacus
<noun.artifact>
abacus
semantic pointers
hypernym
a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave
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abacus
<noun.artifact>
abacus
semantic pointers
hypernym