definition of Wikipedia
|Type of site||Encyclopedia, Dictionary, Thesaurus|
|Available language(s)||English, Spanish|
|Created by||Lexico Publishing Group|
|Alexa rank||177 (July 2012[update])|
Reference.com was launched by InReference, Inc in February, 1997. The site was later acquired by Lexico Publishing Group, LLC. In 2005, Lexico announced that Reference.com would begin offering searches of Wikipedia content. In mid-2007, the site typically ranked in the mid-200s among the most popular websites on the Internet. The popularity of dictionary.com had been greatly boosted by Google's practice of offering a link at the top of their search results that go to the dictionary.com definition. This exclusive relationship was terminated without explanation to the public when the Google links were redirected to definitions at Answers.com. (In December of 2009, the Answers.com links were replaced with Google's own dictionary.) More recently, Google added a dictionary.com definition link for certain search words in a non-exclusive relationship (along with links to definitions from a few other commercial reference websites). On 3 July 2008, InterActiveCorp acquired Lexico Publishing Group, LLC and its three properties: Thesaurus.com, Reference.com, and Dictionary.com.
Reference.com reproduces content from external sources. The site's sources include other online dictionaries, encyclopedias, and a search of terms found on other websites such as Wikipedia and the CIA World Factbook. The site can also search Usenet groups and other mailing lists.
Reference.com in 2010 topped the list compiled by The Wall Street Journal ranking websites by how many third-party tracking cookies were added to the user's computer. Reference.com added 234 tracking cookies when encountering a first-time user.
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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
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Tips: browse the semantic fields (see From ideas to words) in two languages to learn more.