supercontinent

/S UW0 P ER0 K AA0 N T AH0 N AH0 N T/
noun
  1. 1

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

  2. 2

    A modern landmass composed of multiple continents, i.e. Afro-Eurasia or the Americas. (Compare subcontinent).

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Source: https://en.wiktionary.org/wiki/supercontinent