from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The movement, formation, or re-formation of continents described by the theory of plate tectonics.
from the GNU version of the Collaborative International Dictionary of English.
- the movements of continents relative to each other across the Earth's surface; see
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology The slow movement of continents explained by
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the gradual movement and formation of continents (as described by plate tectonics)
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