pseudoscience
Concise Oxford English Dictionary © 2008 Oxford University Press:
pseudoscience/ˈsjuːdəʊsʌɪəns/
▶noun a collection of beliefs or practices mistakenly regarded as being based on scientific method.
– derivatives
pseudoscientific adjective,
pseudoscientist noun.
pseudoscientific adjective,
pseudoscientist noun.
'pseudoscience' also found in these Oxford entries:

