pseudoscience

noun2

1. •
   Any body of knowledge that purports to be scientific or to be supported by science (or may appear to be scientific) but which fails to comply with the scientific method (or rather, is not true science).

   • The fantastical pseudo-science of alchemy has in all ages had its numerous votaries … — 1796
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. — 1952