combination car

Short definition from Wiktionary

Noun

1. 1
   A railroad car containing two or more compartments used for different purposes, transporting passengers and freight.
2. 2
   A vehicle that serves either as a hearse or as an ambulance.
3. 3
   A tram or streetcar with separate open and closed compartments, often with the open compartment allowing smoking where the closed compartment does not.