from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The movement, formation, or re-formation of continents described by the theory of plate tectonics.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The slow movement of continents explained by 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 plate tectonics.
- n. the very slow (ca. 1-5 cm per year) movement of the continents and parts of continents relative to each other and to the points of upwelling of magma in the viscous layers beneath the continents; -- causing, for example, the opening of the South Atlantic Ocean by the movement of Africa and South America away from each other. See also plate tectonics.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the gradual movement and formation of continents (as described by plate tectonics)
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