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ultisol

American  
[uhl-tuh-sawl, -sol] / ˈʌl təˌsɔl, -ˌsɒl /

noun

  1. a weathered, red and yellow acidic soil of warm, humid areas that is agriculturally productive when treated with lime and organic fertilizers.

Etymology

Origin of ultisol

First recorded in 1965–70; ulti(mate) + -sol

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.