Abacuses

n. frame holding bars strung with beads which are used to make mathematical calculations; uppermost part of a column (Architecture)

Noun
1. a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave
(hypernym) tablet
2. a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves
(hypernym) calculator, calculating machine

(pl. )
of Abacus
  

ABACHI. PALLOTTOLIERI