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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.
1.a book containing a classified list of synonyms
ThesaurusThe*sau"rus (?), n.; pl. Thesauri (#). [L. See Treasure.] A treasury or storehouse; hence, a repository, especially of knowledge; -- often applied to a comprehensive work, like a dictionary or cyclopedia.
European Thesaurus on International Relations and Area Studies • Getty Thesaurus of Geographic Names • Historical Thesaurus of the Oxford English Dictionary • RCA Thesaurus • Roget's Thesaurus • Thesaurus Linguae Graecae • Thesaurus Linguae Latinae • Thesaurus Linguae Sericae • Thesaurus Logarithmorum Completus • Thesaurus florentinus • Thesaurus logarithmorum completus
record; register; list; listing[Classe]
ensemble de mots (fr)[Classe]
contenu écrit des livres (fr)[DomainDescrip.]
||This article's use of external links may not follow Wikipedia's policies or guidelines. Please improve this article by removing excessive or inappropriate external links, and converting useful links where appropriate into footnote references. (May 2012)|
A thesaurus is a reference work that lists words grouped together according to similarity of meaning (containing synonyms and sometimes antonyms), in contrast to a dictionary, which contains definitions and pronunciations. The largest thesaurus in the world is the Historical Thesaurus of the Oxford English Dictionary, which contains more than 920,000 entries.
In antiquity, Philo of Byblos authored the first text that could now be called a thesaurus. In Sanskrit, the Amarakosha is a thesaurus in verse form, written in the 4th century. The first example of the modern genre, Roget's Thesaurus, was compiled in 1805 by Peter Mark Roget, and published in 1852. Entries in Roget's Thesaurus are listed conceptually rather than alphabetically.
Although including synonyms, a thesaurus should not be taken as a complete list of all the synonyms for a particular word. The entries are also designed for drawing distinctions between similar words and assisting in choosing exactly the right word. Unlike a dictionary, a thesaurus entry does not give the definition of words.
The word "thesaurus" is derived from 16th-century New Latin, in turn from Latin thesaurus, which is the latinisation of the Greek θησαυρός (thēsauros), literally "treasure store",, Henry George Liddell, Robert Scott, A Greek–English Lexicon, on Perseus</ref> generally meaning a collection of things which are of big importance or value (and thus the medieval rank of thesaurer was a synonym for treasurer). This meaning has been largely supplanted by Roget's usage of the term.
In Information Science, Library Science, and Information Technology, specialized thesauri are designed for information retrieval. They are a type of controlled vocabulary, for indexing or tagging purposes. Such a thesaurus can be used as the basis of an index for online material. The Art and Architecture Thesaurus, for example, is used to index the Canadian Information retrieval thesauri are formally organized so that existing relationships between concepts are made explicit. As a result, they are more complex than simpler controlled vocabularies such as authority lists and synonym rings. Each term is placed in context, allowing a user to distinguish between "bureau" the office and "bureau" the furniture. Following international standards, they are generally arranged hierarchically by themes, topics or facets. Unlike a literary thesaurus, these specialized thesauri typically focus on one discipline, subject or field of study.
In information technology, a thesaurus represents a database or list of semantically orthogonal topical search keys. In the field of Artificial Intelligence, a thesaurus may sometimes be referred to as an ontology.
Thesauri for information retrieval are typically constructed by information specialists, and have their own unique vocabulary defining different kinds of terms and relationships:
Terms are the basic semantic units for conveying concepts. They are usually single-word nouns, since nouns are the most concrete part of speech. Verbs can be converted to nouns – "cleans" to "cleaning", "reads" to "reading", and so on. Adjectives and adverbs, however, seldom convey any meaning useful for indexing. When a term is ambiguous, a “scope note” can be added to ensure consistency, and give direction on how to interpret the term. Not every term needs a scope note, but their presence is of considerable help in using a thesaurus correctly and reaching a correct understanding of the given field of knowledge.
"Term relationships" are links between terms. These relationships can be divided into three types: hierarchical, equivalency or associative.
RDF thesaurus formats:
XML thesaurus formats:
The ANSI/NISO Z39.19 Standard of 2005 defines guidelines and conventions for the format, construction, testing, maintenance, and management of monolingual controlled vocabularies including lists, synonym rings, taxonomies, and thesauruses.
For multilingual vocabularies, the ISO 5964 Guidelines for the establishment and development of multilingual thesauri can be applied.
Thesaurus Construction and Use: a practical manual. Jean Aitchison, Allan Gilchrist and David Bawden. London and New York: Europa Publications (2000).
|Look up thesaurus in Wiktionary, the free dictionary.|