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mollisol

American  
[mol-uh-sawl, -sol] / ˈmɒl əˌsɔl, -ˌsɒl /

noun

  1. a productive agricultural soil common to the world's grasslands, characterized by a dark surface layer rich in organic matter.


Etymology

Origin of mollisol

1970–75; < Latin molli ( s ) soft + -sol