any of various methods, theories, or systems, as astrology, psychokinesis, or clairvoyance, considered as having no scientific basis.

1835–45; pseudo- + science

pseudoscientific [soo-doh-sahy-uhn-tif-ik] , adjective
pseudoscientifically, adverb
pseudoscientist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pseudoscience (ˌsjuːdəʊˈsaɪəns)
a discipline or approach that pretends to be or has a close resemblance to science

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Cultural Dictionary
pseudoscience [(sooh-doh-seye-uhns)]

A system of theories or assertions about the natural world that claim or appear to be scientific but that, in fact, are not. For example, astronomy is a science, but astrology is generally viewed as a pseudoscience.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Speculative pseudoscience in a magazine focused on the dismal science.
The champions of empiricism show an unattractive hubris when they go after what
  they see as pseudoscience.
The first is excellent on the cosmology and physics interface and the second is
  great at debunking pseudoscience lunacy de jour.
Even health care workers are falling for the pseudoscience behind this myth.
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