Countinghouse \Count"ing*house`\ (kount"?ng-hous`), Countingroom
\Count"ing*room`\ (kount"?ng-r??m`), n. [See {Count}, v.]
The house or room in which a merchant, trader, or
manufacturer keeps his books and transacts business; the
offices used by the accountants of a business.
[1913 Webster + WordNet 1.5]