Craton

Dictionary cra·ton (krā'tŏn')
n.
A large portion of a continental plate that has been relatively undisturbed since the Precambrian era and includes both shield and platform layers.

Geological Glossary Craton

Name given to lighter-weight crust rock that generally rode above sea level, drifting about to make and remake islands and continents in the Earth's early history.

WordNet

The noun craton has one meaning:

Meaning #1: the part of a continent that is stable and forms the central mass of the continent; typically Precambrian