procaine
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 dentistWord Originearly 20th cent.: from pro- (denoting substitution) + -caine (from cocaine).
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procaine