Definition of citronella noun from the Oxford Advanced American Dictionary

 

citronella

 noun
noun
NAmE//ˌsɪtrəˈnɛlə//
 
(also citronella oil)[uncountable]
 
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a natural oil that smells like lemons and is used to keep away insects and in perfume, and soap
See the Oxford Advanced Learner's Dictionary entry: citronella