A miniature variation of a universe that's different in ways other than ours. It was originally used in Rick and Morty "The Rick's Must Be Crazy" to power Rick's space cruiser within that microverse contained the miniverse and within the miniverse contained the teenyverse.
*Car Breaks Down*
Morty-Oh, boy. W-what's wrong, Rick? Is it the quantum carburetor or something?

Rick-Jesus, Morty. You can't just add a *burp*-- Sci-Fi word to a car word and hope it means something.

Rick-Hmm looks like it's the microverse battery.
by MightyToad360YT November 13, 2019