Any of various devices on which calculation or counting is performed manually: esp. a frame with rows of wires or grooves along which beads are slid…
| 单词 | θ116210 |
| 释义 | the world > relative properties > number > mathematical instruments > [noun] > arithmetical instrument > abacus (6) abacus1686 Any of various devices on which calculation or counting is performed manually: esp. a frame with rows of wires or grooves along which beads are slid… suan-pan1736 The Chinese abacus. bead-frame1858 a frame containing beads strung upon wires used for teaching numeration, an abacus. soroban1891 A kind of abacus used in Japan, adapted from the swan-pan. counting-frame1920 = abacus, n. 1b. Subcategories:— user of (1) |
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