virtual

virtual adj.  [via the technical term `virtual memory',
   prob. from the term `virtual image' in optics] 1. Common
   alternative to {logical}; often used to refer to the artificial
   objects (like addressable virtual memory larger than physical
   memory) created by a computer system to help the system control
   access to shared resources.  2. Simulated; performing the functions
   of something that isn't really there.  An imaginative child's doll
   may be a virtual playmate.  Oppose {real}.