Forming nouns and adjectives with a preceding algebraic symbol with the sense ‘(an entity or set) consisting of as many parts or elements as indicated by the symbol, such as n-tuple.
From the ending of quintuple, octuple, etc..
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。