citronelle
/ˌsɪtrəˈnɛl/noun
1A liqueur flavoured with lemon peel. Now rare.
2More fully citronelle oil. Citronella oil. Now rare.
3More fully citronelle tea. A type of tea made from an infusion of lemon grass.
Origin
Early 19th century; earliest use found in Samuel Frederick Gray (1766–1828), naturalist and pharmacologist. From French †citronelle (now citronnelle), denoting any of various plants whose herbs have a strong lemony smell, liqueur flavoured with lemon peel from citron + -elle.