Lemon is a citrus fruit, primarily native to Northeast India and belonging to the flowering plant species in the Rutaceae family. It is a small evergreen tree. Lemons, which carry volatile oil, are extensively cultivated in regions with a temperate climate, such as India, South America, Southeast Asia, California, the Aegean, and the Mediterranean. The fruit is primarily used for its juice, while its pulp and peel find applications in culinary and baking industries.