abacus
/ˈæbəkəs/noun
(pl. abacuses)
1
- an oblong frame with rows of wires or grooves along which beads are slid, used for calculating算盘。
2
- Architecture the flat slab on top of a capital, supporting the architrave【建筑】顶板。
词源
late Middle English (denoting a board strewn with sand on which to draw figures)： from Latin, from Greek abax, abak- 'slab, drawing board', of Semitic origin; probably related to Hebrew 'āḇāq 'dust'.