thesaurus
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the·sau·rus

noun \thi-ˈsr-əs\
plural the·sau·ri\-ˈsr-ˌī, -ˌē\ or the·sau·rus·es\-ˈsr-ə-səz\

Definition of THESAURUS

2
a : a book of words or of information about a particular field or set of concepts; especially : a book of words and their synonyms
b : a list of subject headings or descriptors usually with a cross-reference system for use in the organization of a collection of documents for reference and retrieval
the·sau·ral \-ˈsr-əl\ adjective

Origin of THESAURUS

New Latin, from Latin, treasure, collection, from Greek thēsauros
First Known Use: circa 1823

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