supercontinent

noun

A large continent that, according to the theory of plate tectonics, broke up into smaller continents. Gondwana and Laurasia were supercontinents.

noun

A very large continent that split into smaller ones in the Earth’s geologic past.

noun

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)