emulator
noun[C]
uk/ˈemjʊleɪtər/usaperson,group,product, etc. thatcopiesthebehaviourof anotherperson, etc.:
Thegrowthof iTunes anditsemulators hasforcedchangesinregulationsgoverningthesaleofmusic.
IT
acomputersystemthat isdesignedtobehavein the same way as a differentsystem:
You will need toinstallaWindowsemulator torunMicrosoftprogramson a Linuxmachine.