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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