cit·ron·el·la
noun/ˌsɪtrəˈnelə/
/ˌsɪtrəˈnelə/
[uncountable]- a type of grass from which an oil used in perfumes and soap is obtained
香茅（香茅油用于香水和肥皂） Oxford Collocations DictionaryCitronella is used before these nouns:- candle
Word Originmid 19th cent.: modern Latin, from citron + the diminutive suffix -ella.