| The columns stand less than their diameter apart, and the abaci are so broad that they nearly touch. |
| The abaci are all square in plan, and both bases and caps are set at right angles to the direction of the arches they support. |
| The abaci of the capitals are either square or octagonal in plan. |
| The abaci are new, and the angle-shafts and bases as well, but the capitals are old, though decayed. |
| Liber abaci was not the first book written in Europe to describe the new numeral system. |
| Abacus, plural abaci or abacuses, calculating device, probably of Babylonian origin, that was long important in commerce. |
