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''Roget's Thesaurus'' is a widely used English-language thesaurus, created in 1805 by Peter Mark Roget (1779–1869), British physician, natural theologian and lexicographer. It was released to the public on 29 April 1852.〔A History of Roget's Thesaurus Werner Hüllen http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199254729.001.0001/acprof-9780199254729〕 The original edition had 15,000 words, and each new edition has been larger.〔(Roget's Thesaurus ) Karcpeles Library〕 The Karpeles Manuscript Library Museum houses the original manuscript in its collection.〔 The name "Roget" is trademarked in parts of the world, such as the United Kingdom.〔(Case details for Trade Mark 2055476 )〕 By itself, it is not protected in the United States of America, where use of the name "Roget" in the title of a thesaurus does not necessarily indicate any relationship to Roget directly; it has come to be seen as a generic thesaurus name.〔"The name has become synonymous with the ''Thesaurus'', yet Dr Roget himself is a shadowy figure." Lloyd 1982, p.xiii〕 Roget described his thesaurus in the foreword to the first edition: It is now nearly fifty years since I first projected a system of verbal classification similar to that on which the present work is founded. Conceiving that such a compilation might help to supply my own deficiencies, I had, in the year 1805, completed a classed catalogue of words on a small scale, but on the same principle, and nearly in the same form, as the Thesaurus now published.〔Lloyd 1982, p.xix〕 ''Roget's Thesaurus'' is composed of six primary classes.〔(Table of contents ) 〕 Each class is composed of multiple divisions and then sections. This may be conceptualized as a tree containing over a thousand branches for individual "meaning clusters" or semantically linked words. Although these words are not strictly synonyms, they can be viewed as colours or connotations of a meaning or as a spectrum of a concept. One of the most general words is chosen to typify the spectrum as its headword, which labels the whole group. Roget's schema of classes and their subdivisions is based on the philosophical work of Leibniz (see Leibniz—Symbolic thought), itself following a long tradition of epistemological work starting with Aristotle. Some of Aristotle's Categories are included in Roget's first class "abstract relations". == See also == *'' Moby Thesaurus'' * Outline of ''Roget's Thesaurus'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Roget's Thesaurus」の詳細全文を読む スポンサード リンク
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