Lewis Short
būleutērĭum | -on (noun N) = βουλευτήριον: ()
* The place where the Greek senate assembled, the senate-house: in curiā Syracusis, quem locum illi buleuterium nomine appellant,Cic. Verr. 2, 2, 21, § 50: Cyzici et buleuterion vocant aedificium amplum sine ferreo clavo, etc.,Plin. 36, 15, 23, § 100.
Charlton T. Lewis, Charles Short, A Latin Dictionary