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  2. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    In current practice, the single 'word' "iff" is almost always read as the four words "if and only if". However, in the preface of General Topology , Kelley suggests that it should be read differently: "In some cases where mathematical content requires 'if and only if' and euphony demands something less I use Halmos' 'iff ' ".

  3. Cognitive synonymy - Wikipedia

    en.wikipedia.org/wiki/Cognitive_synonymy

    If a word is cognitively synonymous with another word, they refer to the same thing independently of context.Thus, a word is cognitively synonymous with another word if and only if all instances of both words express the same exact thing, and the referents are necessarily identical, which means that the words' interchangeability is not context-sensitive.

  4. Thesaurus - Wikipedia

    en.wikipedia.org/wiki/Thesaurus

    Thesaurus Linguae Latinae. A modern english thesaurus. A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book where one can find different words with similar meanings to other words), [1] [2] sometimes as a hierarchy of broader and narrower terms ...

  5. WordNet - Wikipedia

    en.wikipedia.org/wiki/WordNet

    WordNet is a lexical database of semantic relations between words that links words into semantic relations including synonyms, hyponyms, and meronyms. The synonyms are grouped into synsets with short definitions and usage examples. It can thus be seen as a combination and extension of a dictionary and thesaurus.

  6. Thesaurus (information retrieval) - Wikipedia

    en.wikipedia.org/wiki/Thesaurus_(information...

    ISO 25964, the international standard for information retrieval thesauri, defines a thesaurus as a “controlled and structured vocabulary in which concepts are represented by terms, organized so that relationships between concepts are made explicit, and preferred terms are accompanied by lead-in entries for synonyms or quasi-synonyms.” A ...

  7. Synonym - Wikipedia

    en.wikipedia.org/wiki/Synonym

    Synonym list in cuneiform on a clay tablet, Neo-Assyrian period [1] A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. [2] For example, in the English language, the words begin, start, commence, and initiate are all synonyms of one another: they are ...

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  9. Synonym (taxonomy) - Wikipedia

    en.wikipedia.org/wiki/Synonym_(taxonomy)

    However, Araschnia levana is not a synonym of Papilio levana in the taxonomic sense employed by the Zoological code. [2] Unlike synonyms in other contexts, in taxonomy a synonym is not interchangeable with the name of which it is a synonym. In taxonomy, synonyms are not equals, but have a different status.