noun, plural ab·a·cus·es, ab·a·ci [ab-uh-sahy, -kahy, uh-bak-ahy] /ˈæb əˌsaɪ, -ˌkaɪ, əˈbæk aɪ/.
Origin of abacus
Examples from the Web for abaci
The capitals are similarly carved, and the abaci have conventional foliage.
The capitals here are very close imitations of Classical work, with the abaci frequently concave on plan.Brick and Marble in the Middle Ages|George Edmund Street
Take, for instance, this story of the Cat and the Rats, which I sketched on one of the abaci of the southern walk of the cloister.
It has three shafts on each side, all with good capitals and abaci, from which spring two carved and one plain arch.Portuguese Architecture|Walter Crum Watson
The abaci are carved throughout with conventional foliage, well arranged and delicately cut.
British Dictionary definitions for abaci
noun plural -ci (-ˌsaɪ) or -cuses
Word Origin for abacus
Word Origin and History for abaci
late 14c., "sand table for drawing, calculating, etc.," from Latin abacus, from Greek abax (genitive abakos) "counting table," from Hebrew abaq "dust," from root a-b-q "to fly off." Originally a drawing board covered with dust or sand that could be written on to do mathematical equations. Specific reference to a counting frame is 17c. or later.