Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
cyclopedia
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "cyclopedia" is not correct in standard written English; the correct term is "encyclopedia." You can use "encyclopedia" when referring to a comprehensive reference work containing information on a wide range of subjects or a specific field.
Example: "I consulted the encyclopedia to find detailed information about ancient civilizations."
⚠ May contain grammatical issues
Encyclopedias
News & Media
Alternative expressions(9)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
16 human-written examples
(Its founder, Frank E. Compton, had previous experience in the field of encyclopaedia publication, having bought publication rights to the Student's Cyclopedia in 1912).
Encyclopedias
His prolific literary output (700 scientific papers and 66 books) included several landmark encyclopaedic works: Cyclopedia of American Horticulture (4 vol., 1900 02); Cyclopedia of American Agriculture (4 vol., 1907 09); and The Standard Cyclopedia of Horticulture (6 vol., 1914).
Encyclopedias
After studying art and ornithology in his leisure time, he became assistant editor of Rees's Cyclopedia and in 1808 published the first volume of American Ornithology.
Encyclopedias
In 1894 Frank E. Compton sold a U.S. school encyclopaedia, the Students Cyclopedia, from door to door to pay his way through college.
Encyclopedias
His many impressive undertakings included the creation in 1943 of a Dictionary of United States Army Terms and the editing of the three-volume The New Century Cyclopedia of Names (1954; with William D. Halsey), The World Book Encyclopedia Dictionary (1963), and ongoing issues of The Barnhart Dictionary Companion (with his son David K. Barnhart).
Encyclopedias
They Cyclopedia was edited by James Grant Wilson… Lengty article about errors appearing in the Columbia Encyclopadie, the Encyclopadie Britannica, and the World Almanac.
News & Media
The fact that the fourteen biographies were fictitious was not generally known until thirty years after the publication of the Cyclopedia.
News & Media
Slonimsky began contributing to Oscar Thompson's International Cyclopedia of Music & Musicians in 1939 & upon Thompson's death, rose to its editorship in 1946; he remained at the helm through 1958, supervising the 4th through 8th editions.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
3 human-written examples
Also absorbed were Smith's Dictionary of Greek and Roman Biography, Nuttall's 1906 Encyclopedia, Chambers CyclopediaAikenken's General Biography, Rose's Biographical Dictionary, Easton's Bible Dictionary and many others.
News & Media
In reaction to the period's produced "alternative" music, this Richmond group specialised in post-rock drones, on records such as Brown Cyclopedia (1995) and Pearls From the River (2003).
News & Media
4. I.e., A Preliminary Discourse on the Study of Natural Philosophy, initially the introductory volume to Dionysius Lardner's Cabinet Cyclopedia.
Science
Expert writing Tips
Best practice
When referring to a comprehensive collection of knowledge, use the standard spelling "encyclopedia" rather than "cyclopedia" to ensure clarity and credibility.
Common error
Avoid using "cyclopedia" in formal writing; always double-check your spelling and use "encyclopedia" instead.
Source & Trust
88%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "cyclopedia" is as a noun. While it can technically function as a noun, Ludwig AI indicates that it is not the standard spelling. It is an alternative spelling for the word "encyclopedia".
Frequent in
Encyclopedias
41%
News & Media
59%
Formal & Business
0%
Less common in
Science
0%
Social Media
0%
Reference
0%
Ludwig's WRAP-UP
In summary, while "cyclopedia" functions grammatically as a noun referring to a comprehensive reference work, it is an alternative spelling of the more common and accepted term "encyclopedia". According to Ludwig AI, "cyclopedia" is not correct in standard written English. Its presence in sources like Encyclopedia Britannica and The New Yorker indicates its occasional use, particularly in historical contexts, but modern writing should favor the standard spelling. Therefore, to ensure clarity and avoid potential confusion, it is best to use "encyclopedia" in contemporary writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
encyclopedia
Standard and widely accepted term for a comprehensive reference work.
compendium
Refers to a concise but comprehensive compilation of information on a specific subject.
reference work
A general term for a book or set of books designed for consultation rather than continuous reading.
collection of knowledge
Highlights the aspect of gathering and organizing information.
body of knowledge
Emphasizes the accumulated and organized nature of the information.
overview
Implies a summary or survey of a subject.
digest
A condensed version of a larger work.
handbook
A concise reference book providing specific information or instructions.
survey
A broad and comprehensive overview of a topic.
treatise
A formal and systematic exposition in writing of the principles of a subject.
FAQs
What is the correct spelling, "cyclopedia" or "encyclopedia"?
The correct and standard spelling is "encyclopedia". "Cyclopedia" is an alternative, less common spelling.
Is "cyclopedia" an acceptable alternative to "encyclopedia"?
While "cyclopedia" appears in some historical texts, it's best to use "encyclopedia" in modern writing to avoid confusion.
Where might I encounter the term "cyclopedia"?
You might find "cyclopedia" in older publications. However, contemporary sources overwhelmingly favor "encyclopedia".
What is an encyclopedia?
An encyclopedia is a comprehensive reference work containing information on all branches of knowledge or a particular subject. It is typically arranged alphabetically and provides detailed articles on a wide range of topics.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
3.8/5
Expert rating
Real-world application tested