单词：otc 

形容词

• 
  [1.a.otc] (同义词:[over-the-counter( adj. (证券等)不通过交易所直接售给顾客的 )]  [otc(=Office of Technical Cooperation技术合作处(联合国) )]  )
• 
  注释列句：(of securities) not traded on a stock exchange; "over-the-counter stocks"
• 近义词 -> [unlisted( adj. 未列于表格的, 未上市的 )]