pseudoscience

Etymology

pseudo- + science, 1796, originally "pſeudo-ſcience" in reference to alchemy.

noun

1. Any body of knowledge that purports to be scientific or to be supported by science but which fails to comply with the scientific method.
   The fantastical pseudo-science of alchemy has in all ages had its numerous votaries … 1796, James Pettit Andrews, Robert Henry, History of Great Britain, from the death of Henry viii. to the accession of James vi. of Scotland to the crown of England, page 87
2. Fictitious science as portrayed in science fiction.
   It pulls together first-rate pseudo-science and high-grade detective meller of the Spillane school (but entirely clean) and the result is fine read-and-forget entertainment. Nov 1952, Groff Conklin, Galaxy Science Fiction, page 122, column 1