Ábaco in english
ábaco1 = abacus [abacuses/abaci, -pl.].Example: The abacus, with its beads strung on parallel wires, led the Arabs to positional numeration and the concept of zero many centuries before the rest of the world.
ábaco2 = abacus [abacuses/abaci, -pl.].Example: The abacus is a square slab that sits on top of the column's capital and supports the architrave or arch.