Complex sentence: In DC Comics' DC Universe, a metahuman is a superhuman; the term is roughly synonymous with both "mutant" and "mutate" in the Marvel Universe and "posthuman" in the Wildstorm and Ultimate Marvel Universes.
Split into simpler sentences: In DC Comics' DC Universe, a metahuman is a superhuman. The term is roughly synonymous with both "mutant" and "mutate" in the Marvel Universe and "posthuman" in the Wildstorm and Ultimate Marvel Universes.