dirtiness, uncleanness - the state of being unsanitary

marl - a loose and crumbling earthy deposit consisting mainly of calcite or dolomite; used as a fertilizer for soils deficient in lime

regosol - a type of soil consisting of unconsolidated material from freshly deposited alluvium or sand

residual clay, residual soil - the soil that is remaining after the soluble elements have been dissolved

surface soil, topsoil - the layer of soil on the surface

subsoil, undersoil - the layer of soil between the topsoil and bedrock

alluvial soil - a fine-grained fertile soil deposited by water flowing over flood plains or in river beds

bog soil - poorly drained soils on top of peat and under marsh or swamp vegetation

clay - a very fine-grained soil that is plastic when moist but hard when fired

clunch - hardened clay

desert soil, desertic soil - a type of soil that develops in arid climates

earth, ground - the loose soft material that makes up a large part of the land surface; "they dug into the earth outside the church"

caliche, hardpan - crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions

fuller's earth - an absorbent soil resembling clay; used in fulling (shrinking and thickening) woolen cloth and as an adsorbent

gilgai soil - soil in the melon holes of Australia

gumbo, gumbo soil - any of various fine-grained silty soils that become waxy and very sticky mud when saturated with water

humus - partially decomposed organic matter; the organic component of soil

indurated clay - hardened clay

Indian red - a red soil containing ferric oxide; often used as a pigment

laterite - a red soil produced by rock decay; contains insoluble deposits of ferric and aluminum oxides

loam - a rich soil consisting of a mixture of sand and clay and decaying organic materials

loess - a fine-grained unstratified accumulation of clay and silt deposited by the wind

mould, mold - loose soil rich in organic matter

mud, clay - water soaked soil; soft wet earth

bole - a soft oily clay used as a pigment (especially a reddish brown pigment)

podsol, podsol soil, podsolic soil, podzol, podzol soil - a soil that develops in temperate to cold moist climates under coniferous or heath vegetation; an organic mat over a gray leached layer

prairie soil - a type of soil occurring under grasses in temperate climates

sand - a loose material consisting of grains of rock or coral

sedimentary clay - clay soil formed by sedimentary deposits

silt - mud or clay or small rocks deposited by a river or lake

boulder clay, till - unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together

tundra soil - a black mucky soil with a frozen subsoil that is characteristic of arctic and subarctic regions

wiesenboden - a dark meadow soil rich in organic material; developed through poor drainage in humid grassy or sedge regions

object, physical object - a tangible and visible entity; an entity that can cast a shadow; "it was full of rackets, balls and other objects"

badlands - deeply eroded barren land

bottomland, bottom - low-lying alluvial land near a river

coastland - land in a coastal area

ploughland, plowland, tillage, tilled land, cultivated land, farmland, tilth - arable land that is worked by plowing and sowing and raising crops

overburden - the surface soil that must be moved away to get at coal seams and mineral deposits

permafrost - ground that is permanently frozen

rangeland - lan suitable for grazing livestock

greensward, sod, sward, turf - surface layer of ground containing a matt of grass and grass roots

wetland - a low area where the land is saturated with water

geographic area, geographic region, geographical area, geographical region - a demarcated area of the Earth

alter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"

foul - make unclean; "foul the water"

contaminate, pollute, foul - make impure; "The industrial wastes polluted the lake"

smear - stain by smearing or daubing with a dirty substance

slime - cover or stain with slime; "The snake slimed his victim"

muddy, muddy up - dirty with mud

splash - soil or stain with a splashed liquid

mud, muck up, muck, mire - soil with mud, muck, or mire; "The child mucked up his shirt while playing ball in the garden"

crock - soil with or as with crock

blemish, spot - mar or impair with a flaw; "her face was blemished"