o·ver-the-coun·ter
adjective/ˌəʊvə ðə ˈkaʊntə(r)/
/ˌəʊvər ðə ˈkaʊntər/
(abbreviation OTC)
[only before noun]- (of drugs and medicines) 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 - (business, North American English) (of stocks and shares) not appearing in an official stock exchange list
场外交易的