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WordReference Random House Unabridged Dictionary of American English © 2024al•fi•sol (al′fə sôl′, -sol′),USA pronunciation n. - Geology, Agriculturea fertile soil of humid regions that occurs worldwide, esp. where native broadleaf forests were established, and is highly productive for agriculture.
- alf- (according to the U.south, southern. Soil Conservation Service, initiator of the term, a "meaningless syllable'') + -i- + -sol 1970–75
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