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  2. 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 ...

  3. Addition - Wikipedia

    en.wikipedia.org/wiki/Addition

    Addition is commutative, meaning that one can change the order of the terms in a sum, but still get the same result. Symbolically, if a and b are any two numbers, then a + b = b + a. The fact that addition is commutative is known as the "commutative law of addition" or "commutative property of addition".

  4. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    Arithmetic is closely related to number theory and some authors use the terms as synonyms. [8] However, in a more specific sense, number theory is restricted to the study of integers and focuses on their properties and relationships such as divisibility, factorization, and primality. [9] Traditionally, it is known as higher arithmetic. [10]

  5. Longman Dictionary of Contemporary English - Wikipedia

    en.wikipedia.org/wiki/Longman_Dictionary_of...

    1st edition: Includes 75,000 collocations, 80,000 examples, 7,000 synonyms and antonyms, academic words list, academic collocations list (2,500 most frequent collocations based on analysis of the Pearson International Corpus of Academic English). 1-year subscription includes additional collocations and synonyms, interactive exercises.

  6. Oxford Advanced Learner's Dictionary - Wikipedia

    en.wikipedia.org/wiki/Oxford_Advanced_Learner's...

    1st edition: Includes over 25,000 synonyms and antonyms, up to 12 synonyms given for each of 5,000 key words. ... (Oxford ESL Dictionary for learners of English new ...

  7. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    In addition, the symbol + represents the operation of addition, which results in a sum, while the symbol − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous. Plus and minus are Latin terms meaning 'more' and 'less', respectively.

  8. Oxford Dictionary of English - Wikipedia

    en.wikipedia.org/wiki/Oxford_Dictionary_of_English

    Third edition: The Third Edition is available online via Oxford Dictionaries Online, as well as in print. [4] The online version is updated every three months. [5] Oxford Dictionaries Online also includes the New Oxford American Dictionary, Oxford Thesaurus of English, Oxford American Writer's Thesaurus and grammar and usage resources. [6]

  9. Macmillan English Dictionary for Advanced Learners - Wikipedia

    en.wikipedia.org/wiki/Macmillan_English...

    In addition to the dictionary, the online version had a thesaurus function enabling users to find synonyms for any word, phrase or meaning. [9] There was also a blog (the Macmillan Dictionary Blog) with daily postings on language issues, especially on global English and language change. [10]