柯林斯詞典abacus /??b?k?s/ (abacuses) 1. N-COUNT An abacus is a frame used for counting. It has rods with sliding beads on them. 算磐 返回 abacus劍橋詞典 abacus noun [C] (COUNTING TOOL) a square or rectangular frame holding an arrangement of small balls on metal rods or wires , used for counting or for doing calculations 算磐 返回 abacus