Goanna in Australia likened goannas to the South American lizards.. Over time, the initial vowel sound was dropped. A similar explanation is used to link possum to the American opossum. Another possibility is that the name might have derived from the South African term for a monitor lizard, "leguaan", as the Cape of Good Hope was a popular refresher stop for immigrant ships to Australia from Britain. For a list of all monitor lizards of the genus, see Complete list of genus "Varanus". The following are found in Australia. For the most part, in common names, "goanna" and "monitor" are interchangeable.
Goanna glands had been found in both goannas and iguanas. Because the goanna regularly eats snakes (often involving a fierce struggle between the two), they are often said to be immune to snake venom. The goanna does eat venomous snakes, but no evidence found suggests an actual poison immunity. Other stories say that the lizard eats a legendary plant, or drinks from a healing spring which neutralises the poison. This is immortalised in Banjo Paterson's humorous poem "Johnson's Antidote". Possibly related to the above poison immunity, goanna fat or oil has been anecdotally imbued with mystical healing properties. Aborigines traditionally used