Freebase(0.00 / 0 votes)Rate this definition: Quinine. Quinine is a natural white crystalline alkaloid having antipyretic, antimalarial, analgesic, and anti-inflammatory properties and a bitter taste. It is a stereoisomer of quinidine which, unlike quinine, is an antiarrhythmic.
Papua New Guinea is the closest country to Australia. Australia's northern tip, Cape York, is about 150km from Papua New Guinea.Papua New Guinea is followed, in order, by Eas â¦ t Timor, Indonesia, New Caledonia, Philippines, Brunei then New Zealand.Australia is an island continent, it's nearest neighbors are New Zealand, Papua New Guinea and Indonesia.apua New Guinea is the closest country to Australia. Australia's northern tip, Cape York, is about 150km from Papua New Guinea.
   Australia's third-largest island, Kangaroo Island, lies south of  Australia, off the South Australian coast.    Between Tasmania and the mainland are numerous smaller islands in  Bass Strait. The two largest of these are King Island and Flinders  Island.nswer   Tasmania is the island south of the Australian mainland, but it is still part of the nation of Australia, being one of the six states. Macquarie Island is an isl â¦ and south of Australia. 8 people found this useful.