| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| Lyell, Sir Charles |
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| SYLLABICATION: | Ly·ell |
| PRONUNCIATION: |  l   l |
| DATES: | 1797–1875 |
| British geologist whose Principles of Geology (1830–1833) opposed the catastrophic theory of geologic change. A leading proponent of uniformitarianism, he is considered one of the founders of modern geology.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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