A lime (from French lime, from Arabic līma, from Persian līmū, “lemon”) is a citrus fruit, which is typically round, green in color, 3–6 centimeters (1.2–2.4 in) in diameter, and contains acidic juice vesicles.
There are several species of citrus trees whose fruits are called limes, including the Key lime (Citrus aurantifolia), Persian lime, kaffir lime, and desert lime. Limes are a rich source of vitamin C, sour and are often used to accent the flavors of foods and beverages. They are grown year-round. Plants with fruit called “limes” have diverse genetic origins; limes do not form a monophyletic group.
Limes have higher contents of sugars and acids than lemons do. Lime juice may be squeezed from fresh limes, or purchased in bottles in both unsweetened and sweetened varieties.