Webster's Revised Unabridged Dictionary · 1913

Continental drift

Continental drift

the movements of continents relative to each other across the Earth's surface; see plate tectonics.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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