One entry found for abacus.

Main Entry: aba·cus
Pronunciation: ab--ks, -bak-s
Function: noun
Inflected Form(s): plural aba·ci /ab--s, -k; -bak- /; or aba·cus·es
: an instrument for making calculations by sliding counters along rods or in grooves
[abacus illustration]

Pronunciation Symbols