(of drugs and medicines )药品 that can be obtained without a prescription (= a written order from a doctor) 无需处方可买到的;非处方的 OTC medicines and food supplements 非处方药和膳食补充剂 OTC trading of securities 证券的场外交易
- (North American English,
business )商业 (of stocks and shares )股票及证券 not appearing in an official stock exchange list 场外交易的