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Definition of subsoil noun from the Oxford Advanced Learner's Dictionary

subsoil

noun

/ˈsʌbsɔɪl/

/ˈsʌbsɔɪl/

[uncountable]

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the layer of soil between the surface of the ground and the hard rock below it compare topsoilTopics Farmingc2

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See subsoil in the Oxford Advanced American Dictionary

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