Lime is a term referring to a number of different fruits, both species and hybrids and generally citruses, which have their origin in the Himalayan region of India and which are typically round, green to yellow in colour, 3–6 cm in diameter, and generally containing sour and acidicpulp. They are frequently associated with the lemon. Limes are often used to accent the flavours of foods and beverages. They are usually smaller than lemons, and a good source of vitamin C. Limes are grown all year round and are usually sweeter than lemons.

Limes are a small citrus fruit, Citrus aurantifolia, whose skin and flesh are green in colour and which have an oval or round shape with a diameter between one to two inches. Limes can either be sour or sweet, with the latter not readily available in the United States. Sour limes possess a greater sugar and citric acid content than lemons and feature an acidic and tart taste, while sweet limes lack citric acid content and are sweet in flavour.