microworldyoudaoicibaDictYouDict
"The world viewed on a microscopic or subatomic scale; a small-scale theoretical or physical model of the world or of some aspect of it; a microcosm; ( Computing ) a simulated or virtual reality environment", 1920s; earliest use found in Science. From micro- + world.
cyber-youdaoicibaDictYouDict
"Relating to electronic communication networks and virtual reality", Back-formation from cybernetics.