Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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ABC soil a soil made up of three distinct layers, the A or top layer being humus and organic matter, the B layer being clay and oxidized material, and the C layer being loose rock and mineral materials.
Free-Soil of or pertaining to the Free-Soil party of the nineteenth century which opposed the extension of slavery into the territories acquired by the United States.
night soil fertilizer composed of human excrement.
soil conservation a method, such as crop rotation or contour farming, to protect fertile topsoil from erosion or other damage.
soil pipe a drainpipe that carries off waste matter, esp. from a toilet.