Lemon is a citrus fruit that is known for its sour and acidic taste. It is a small, oval-shaped fruit that has a bright yellow skin and juicy, pulpy flesh inside. Lemon trees are native to Asia but are now widely cultivated in many parts of the world, especially in the Mediterranean and tropical regions.
 
Lemons are widely used for culinary and non-culinary purposes. In cooking, lemon juice and zest are used as a flavoring agent in a variety of dishes, including savory and sweet dishes. Lemon juice is also used in marinades, dressings, and sauces. Non-culinary uses of lemons include cleaning, deodorizing, and medicinal purposes.