The avocado is a native plant of Mexico and Central America and is called the Alligator Pear (this is a good pub quiz question), due to its shape and leathery looking skin.It is considered a berry containing a single seed.
Once cut, avocado does brown quickly, but is can be sprinkled with lemon or lime juice to prevent this.
Avocados are the main ingredient in guacamole, but can also be used in salads, sandwiches and ceviche.