no·vo·caine
noun/ˈnəʊvəkeɪn/
/ˈnəʊvəkeɪn/
(also procaine)
[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 Latin novus ‘new’ + -caine (from cocaine).