Medical Dictionary

citronella oil

noun

medical Definition of citronella oil

:a yellowish essential oil with a lemony odor obtained from either of two grasses and used especially as an insect repellent:
a :an oil from citronella grass containing chiefly geraniol
b :an oil from a related grass (Cymbopogon winterianus) containing citronellal, citronellol, and geraniol

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