pro·caine
noun/ˈprəʊkeɪn/
/ˈprəʊkeɪn/
(also novocaine)
[uncountable] (medical)- a substance used to stop somebody from feeling pain in a particular part of their body, especially by a dentist
普鲁卡因（牙医等用的局部麻醉药） Word Originearly 20th cent.: from pro- (denoting substitution) + -caine (from cocaine).