Lemon, (Citrus ×limon), small tree or spreading bush of the rue family (Rutaceae) and its edible fruit. Lemon juice is a characteristic ingredient in many pastries and desserts, such as tarts and the traditional American lemon meringue pie. The distinctive astringent flavour of the fruit, either fresh or preserved, is also used to enhance many poultry, fish, and vegetable dishes worldwide.
Lemons are high in vitamin C, fiber, and various beneficial plant compounds. These nutrients are responsible for several health benefits. In fact, lemons may support heart health, weight control, and digestive health.