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N-SING
（某一學科、個人或群體的）全部詞匯
The lexicon of a particular subject is all the terms associated with it. The lexicon of a person or group is all the words they commonly use.
例句
...the lexicon of management...
管理學詞匯
Chocolate equals sin in most people's lexicon.
巧克力在大多數人的字典里等同于罪惡。
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N-COUNT
（某一語言或學科的）詞匯表
A lexicon is an alphabetical list of the words in a language or the words associated with a particular subject.
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N-COUNT
（尤指希臘語、希伯來語等古老語言的）詞典，字典
A lexicon is a dictionary, especially of a very old language such as Greek or Hebrew.