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stratum
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- Stratum - n. - A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively.
- Stratum - n. - A bed or layer artificially made; a course.
- Stratums - pl. - of Stratum
- Fahlband - n. - A stratum in crystalline rock, containing metallic sulphides.
- Sod - n. - That stratum of the surface of the soil which is filled with the roots of grass, or any portion of that surface; turf; sward.
- Outlier - n. - A part of a rock or stratum lying without, or beyond, the main body, from which it has been separated by denudation.
- Day-coal - n. - The upper stratum of coal, as nearest the light or surface.
- Lithologically - adv. - From a lithological point of view; as, to consider a stratum lithologically.
- Shelf - v. i. - A stratum lying in a very even manner; a flat, projecting layer of rock.
- Thallus - n. - A solid mass of cellular tissue, consisting of one or more layers, usually in the form of a flat stratum or expansion, but sometimes erect or pendulous, and elongated and branching, and forming the substance of the thallogens.
- Outcrop - n. - The coming out of a stratum to the surface of the ground.
- Basset - n. - The edge of a geological stratum at the surface of the ground; the outcrop.
- Bed - n. - A layer or seam, or a horizontal stratum between layers; as, a bed of coal, iron, etc.
- Scaup - n. - A bed or stratum of shellfish; scalp.
- Pan - n. - The hard stratum of earth that lies below the soil. See Hard pan, under Hard.
- Cledge - n. - The upper stratum of fuller's earth.
- Underlie - v. t. - To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel.
- Soil - n. - The upper stratum of the earth; the mold, or that compound substance which furnishes nutriment to plants, or which is particularly adapted to support and nourish them.
- Uniform - a. - Having always the same form, manner, or degree; not varying or variable; unchanging; consistent; equable; homogenous; as, the dress of the Asiatics has been uniform from early ages; the temperature is uniform; a stratum of uniform clay.
- Basseting - n. - The upward direction of a vein in a mine; the emergence of a stratum at the surface.
- Underclay - n. - A stratum of clay lying beneath a coal bed, often containing the roots of coal plants, especially the Stigmaria.
- Base-burner - n. - A furnace or stove in which the fuel is contained in a hopper or chamber, and is fed to the fire as the lower stratum is consumed.
- Girdle - n. - A thin bed or stratum of stone.
- Turf - n. - That upper stratum of earth and vegetable mold which is filled with the roots of grass and other small plants, so as to adhere and form a kind of mat; sward; sod.
- Rubble - n. - A mass or stratum of fragments or rock lying under the alluvium, and derived from the neighboring rock.