Literature written before the emergence of science fiction as a distinct genre (usually thought of as being sometime in the late nineteenth or early twentieth century) that contains elements that would later be associated with science fiction, such as futuristic settings, voyages to other planets, fictional inventions, etc.--- Source of the definition: The Oxford Dictionary of Science Fiction (online), by Jeff Prucher, Oxford University Press Words created in science fiction, criticism or fan literature that have entered mainstream language, plus their history and evolution. Includes citations are drawn from science-fiction books and magazines, fanzines, screenplays, newspapers, comics, folk songs, and the Internet.