A lime (from french lime, from arabic lã„â«ma, from persian lã„â«mã…â«, "lemon")is a hybrid citrus fruit, which is typically round, lime green, 3-6 centimetres (1.2-2.4 in) in diameter, and containing 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 an excellent source of vitamin c, and are often used to accent the flavours 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 do lemons. Lime juice may be squeezed from fresh limes, or purchased in bottles in both unsweetened and sweetened varieties. Lime juice is used to make limeade, and as an ingredient (typically as sour mix) in many cocktails. Lime pickles are an integral part of indian cuisine. South indian cuisine is heavily based on lime; having either lemon pickle or lime pickle is considered an essential of onam sadhya.