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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 undersoil
 地面下的土壤;底土

From: Webster's Revised Unabridged Dictionary (1913)

 Un·der·soil n. The soil beneath the surface; understratum; subsoil.
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From: WordNet (r) 2.0

 undersoil
      n : the layer of soil between the topsoil and bedrock [syn: subsoil]