Meaning of protocontinent

pro•to•con•ti•nent

Pronunciation: (prō"tō-kon'tn-unt), [key]
— n. Geol.
  1. an actual or hypothetical landmass that might later be enlarged into a major continent or broken up into smaller ones.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.