Historical Counting Devices

noun a plural form of the noun 'abaciscus', which refers to a small abacus used in ancient Rome for counting and calculating

• The abacisci in the library are used to calculate complex mathematical equations.
• I found some old abacisci in my grandma's attic, they look pretty cool.
• Check out these abacisci, they're like ancient calculators!
• The abacisci of history help us understand the past in a tangible way.

noun a device used for performing arithmetic calculations, consisting of a frame with rows of wires or grooves along which beads are slid

• The students used abacuses to practice their mental math skills.
• Hey, have you seen those old abacuses in the math classroom?
• I found this cool abacus at the thrift store, wanna check it out?
• His mind worked like an abacus, calculating every possible outcome.