Roundhouse /(?)/

Round·house

Roundhouse

n.
  1. A constable's prison; a lockup, watch-house, or station house. [Obs.]
  2. A cabin or apartment on the after part of the quarter-deck, having the poop for its roof; -- sometimes called the coach. (Naut.)
  3. A house for servicing and repair of locomotive engines, built circularly around a turntable bearing railroad tracks, with several tracks leading in and out.