pseudoscience

pseu·do·sci·ence
P3S1E1U1D2O1S1C3I1E1N1C3E1
UK/ˈs(j)uː.dəʊ.saɪ.əns/

noun

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).

UncommonFirst used 1796Scrabble 20

Meanings

nounpseudoscience (countable and uncountable, plural pseudosciences)

plural pseudosciences · alternative pseudo-science

  1. countablederogatoryuncountableAny 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).First known use 1796

    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
    1 more example

    We had enough to do in this world. Life was a beautiful thing. The man who appreciated its real duties and beauties would have sufficient to employ him without dabbling in pseudo sciences which had their roots in frauds, exposed already a hundred times and yet finding fresh crowds of foolish devotees whose insane credulity and irrational prejudice made them impervious to all argument.

    1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019
  2. countableuncountableFictitious 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 November 28, Groff Conklin, Galaxy Science Fiction, page 122, column 1

Synonyms & antonyms

Also see

Origin

  1. Ancient Greekψεύδω (pseúdō)
  2. Ancient Greekψευδής (pseudḗs)
  3. Middle Englishpseudo-
  4. Englishpseudo-
  5. Proto-Indo-European*sek-?
  6. Proto-Indo-European*skey-
  7. Latinsciō
  8. Latinsciēns
  9. Latinscientia
  10. Old Frenchscience
  11. Middle Englishscience
  12. Englishscience
  13. Englishpseudoscience

From pseudo- + science, first attested in 1796, in reference to alchemy.

Full word history & related roots →

Translations

Afrikaans pseudowetenskap
  • pseudowetenskappurported science
Bulgarian лъженаука, псевдонаука
  • лъженаука (lăženauka)purported science
  • псевдонаука (psevdonauka)purported science
Catalan pseudociència
  • pseudociènciapurported science
Chinese Cantonese 偽科學 /伪科学
  • 偽科學 /伪科学 (ngai⁶ fo¹ hok⁶)purported science
Chinese Mandarin 偽科學 /伪科学
  • 偽科學 /伪科学 (wěikēxué)purported science
Czech pavěda, pseudověda
  • pavědapurported science
  • pseudovědapurported science
Danish pseudovidenskab
  • pseudovidenskabpurported science
Dutch pseudowetenschap
  • pseudowetenschappurported science
Esperanto pseŭdoscienco, falsscienco
  • pseŭdosciencopurported science
  • falssciencopurported science
Estonian pseudoteadus
  • pseudoteaduspurported science
Finnish pseudotiede, näennäistiede
  • pseudotiedepurported science
  • näennäistiedepurported science
French pseudo-science
  • pseudo-sciencepurported science
German Pseudowissenschaft
  • Pseudowissenschaftpurported science
Greek ψευδοεπιστήμη
  • ψευδοεπιστήμη (psevdoepistími)purported science
Hungarian áltudomány
  • áltudománypurported science
Icelandic hjáfræði
  • hjáfræðipurported science
Indonesian ilmu semu, pseudosains
  • ilmu semupurported science
  • pseudosainspurported science
Italian pseudoscienza
  • pseudoscienzapurported science
Japanese 疑似科学
  • 疑似科学 (gijikagaku)purported science
Korean 의사과학, 유사과학
  • 의사과학 (uisagwahak)purported science
  • 유사과학 (yusagwahak)purported science
  • 사이비과학 (saibigwahak)purported science
Latvian pseidozinātne
  • pseidozinātnepurported science
Lithuanian pseudomokslas
  • pseudomokslaspurported science
Norwegian Bokmål pseudovitenskap
  • pseudovitenskappurported science
Persian شبهعلم
  • شبهعلمpurported science
Polish pseudonauka
  • pseudonaukapurported science
Portuguese pseudociência
  • pseudociênciapurported science
Romanian pseudoștiință
  • pseudoștiințăpurported science
Russian псевдонау́ка, лженау́ка
  • псевдонау́ка (psevdonaúka)purported science
  • лженау́ка (lženaúka)purported science
Slovak paveda
  • pavedapurported science
Spanish pseudociencia
  • pseudocienciapurported science
Swedish pseudovetenskap
  • pseudovetenskappurported science
Tamil போலி அறிவியல்
  • போலி அறிவியல் (pōli aṟiviyal)purported science
Thai วิทยาศาสตร์เทียม
  • วิทยาศาสตร์เทียมpurported science
Turkish sahte bilim
  • sahte bilimpurported science
Ukrainian псевдонау́ка, лженау́ка
  • псевдонау́ка (psevdonaúka)purported science
  • лженау́ка (lženaúka)purported science
Vietnamese ngụy khoa học, giả khoa học
  • ngụy khoa họcpurported science
  • giả khoa họcpurported science
Welsh ffugwyddor
  • ffugwyddorpurported science
Cite this entry
APA

pseudoscience. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/pseudoscience

MLA

“pseudoscience.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/pseudoscience. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “pseudoscience,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/pseudoscience.

Source: pseudoscience on Wiktionary, CC BY-SA 4.0.