Lewis & Short

dĭrĭbĭtōrĭum, ii, n. (sc. aedificium; in Dio Cass. 55, 8: τὸ δειριβιτώριον) [id.], the building in which the ballots were sorted (v. diribeo), Suet. Claud. 18; Plin. 6, 40, 76, § 201; 36, 15, 24, § 102 Sillig. N. cr.