Hypertext Webster Gateway: "subsoil"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subsoil \Sub"soil`\, v. t.
To turn up the subsoil of.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subsoil \Sub"soil`\, n.
The bed, or stratum, of earth which lies immediately beneath
the surface soil.
{Subsoil plow}, a plow having a share and standard but no
moldboard. It follows in the furrow made by an ordinary
plow, and loosens the soil to an additional depth without
bringing it to the surface. --Knight.
From WordNet (r) 1.7 (wn)
subsoil
n : the layer of soil between the topsoil and bedrock [syn: {undersoil}]
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