Citron
A source of confusion is that "citron" or similar words in French (and other languages), and English are false friends, as they refer to the lemon. Indeed, into the 16th century, the English name "citron" included the lemon and perhaps the lime as well.
Citron
For many centuries, citron's fragrant essential oil has been used in perfumery, the same oil that was used medicinally for its antibiotic properties. Its major constituent is limonene.