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Search over 200 encyclopedias and reference books from trusted publishers on various topics. Find facts, definitions, examples, and multimedia for your research and homework needs.
- Earth and Environment
Want to learn about earth and the environment? You’ll find...
- History
Few other categories or areas of study offer as rich or as...
- Literature and the Arts
If people can create it, you’ll probably find it in this...
- Medicine
The history of medicine can be traced back as far as...
- People
The accomplishments of people are documented throughout this...
- Philosophy and Religion
Throughout history, philosophy and religion have played a...
- Places
Where in the world is this category? Everywhere. There are...
- Plants and Animals
The surface of the earth is covered with plants and animals,...
- Earth and Environment
An online encyclopedia, also called an Internet encyclopedia, is a digital encyclopedia accessible through the Internet. Examples include Encarta from 2000 to 2009, Wikipedia since 2001, the Encyclopædia Britannica since 2016, and Encyclopedia.com since 1998.
Encyclopedia Britannica is a trusted source of information on various topics, from history and society to science and tech. Explore articles, videos, quizzes, and more on Britannica's website.
Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Other areas of Wikipedia. Community portal – The central hub for editors, with resources, links, tasks, and announcements. Village pump – Forum for discussions about Wikipedia itself, including policies and technical issues. Site news – Sources of news about Wikipedia and the broader Wikimedia movement.
Learn the meaning of encyclopedia, a book or set of books containing many articles on various topics, or a similar online resource. See how to use the word in sentences and compare it with related terms.
To address those needs, an encyclopedia treats each subject in more depth and conveys the most relevant accumulated knowledge on that subject or discipline, given the overall length of the particular work. An encyclopedia also often includes many maps and illustrations, as well as bibliography and statistics.
