CALCŬLĀTOR (λογιστής), a keeper of accounts in general, and also a
teacher of arithmetic. In Roman families of importance there was a
_calculator_ or account-keeper, who is, however, more frequently
called by the name of _dispensator_, or procurator: he was a kind of
steward.
CALCŬLI, little stones or pebbles, used for various purposes, as,
for instance, among the Athenians for voting. Calculi were used
in playing a sort of draughts. Subsequently, instead of pebbles,
ivory, or silver, or gold, or other men (as we call them) were used;
but they still bore the name of calculi. Calculi were also used
in reckoning; and hence the phrases _calculum ponere_, _calculum
subducere_.