supercontinent

listen to the pronunciation of supercontinent
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A very large continent that split into smaller ones in the Earth’s geologic past
Sometimes used to refer, due to their being composed of multiple continents, to one of the following modern landmasses: Afro-Eurasia and the Americas. (compare subcontinent)
{i} (Geology) land mass that is composed of more than one continent; theoretical mass of land that broke apart to form the continents
a very large continent that split into smaller ones in the Earth's geologic past