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oxisol

[ok-si-sawl, -sol]
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noun
  1. a thick, weathered soil of the humid tropics, largely depleted in the minerals that promote fertility, and characteristic of the Amazon and Congo basins.
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Origin of oxisol

First recorded in 1955–60; ox- + -i- + -sol
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018