Indo-Australian Plate

[ in-doh-aw-streyl-yuhn ]

noun

, Geology.

1. a major tectonic division of the earth's crust, comprising India and the Australian continent and adjacent suboceanic basins (the Tasman, South Australian, Mid-Indian, Cocos, and Australian Basins); separated from the Eurasian Plate by the Java Trench, from the Pacific Plate by the Tonga and Kermadec Trenches, and from the African Plate by a series of mid-ocean ridges (the Carlsberg, Mid-Indian, and Southeast Indian Ridges).