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mollisol

[mol-uh-sawl, -sol]
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noun
  1. a productive agricultural soil common to the world's grasslands, characterized by a dark surface layer rich in organic matter.
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Compare brown soils.

Origin of mollisol

1970–75; < Latin molli(s) soft + -sol
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018