"Tristan da Cunha." YourDictionary, n.d. Web. 19 October 2018. <http://www.yourdictionary.com/tristan-da-cunha>.
Tristan da Cunha. (n.d.). Retrieved October 19th, 2018, from http://www.yourdictionary.com/tristan-da-cunha
Tristan da Cunha
An island and volcanic island group of the southern Atlantic Ocean between southern Africa and southern South America. Discovered by the Portuguese in 1506, the islands were annexed by Great Britain in 1816 and are now administered as a dependency of St. Helena.