citronella

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cit·ro·nel·la

 (sĭt′rə-nĕl′ə)
n.
1. A tropical Asian grass (Cymbopogon nardus) that has bluish-green, lemon-scented leaves and yields an essential oil.
2. A pale yellow to brownish aromatic oil obtained from this plant, used chiefly in perfumery and also in some insect repellents and commercial flavorings.

[New Latin, from French citronnelle, lemon oil, diminutive of citron, citron; see citron.]

citronella

(ˌsɪtrəˈnɛlə)
n
1. (Plants) Also called: citronella grass a tropical Asian grass, Cymbopogon (or Andropogon) nardus, with bluish-green lemon-scented leaves
2. (Biochemistry) Also called: citronella oil the yellow aromatic oil obtained from this grass, used in insect repellents, soaps, perfumes, etc
[C19: New Latin, from French citronnelle lemon balm, from citron lemon]

cit•ron•el•la

(ˌsɪ trəˈnɛl ə)

n.
1. a fragrant, S Asian grass, Cymbopogon nardus, cultivated as the source of citronella oil.
[1855–60; < New Latin < French citronelle=citron citron + -elle diminutive suffix]

cit·ro·nel·la

(sĭt′rə-nĕl′ə)
The pale-yellow, lemon-scented oil obtained from the leaves of a tropical Asian grass, used in insect repellents and perfumes.