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age grade and age set
age grade and age set differentiation of social role based on age, commonly found in small-scale societies of North America and East Africa. Age sets are a type of sodality (nonresidential groups that cut across kinship ties and thus promote broader social solidarity) of young men who usually coope...
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steel wool
steel wool abrasive material composed of long steel fibers of varying degrees of fineness that are matted together. The coarser grades are used to remove paint and other finishes, the finer grades for polishing or smoothing a finished surface. Steel wool is much used in kitchens for cleaning and po...
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linoleum block printing
linoleum block printing or linocut, 20th-century development in the art of relief cuts. The linoleum block consists of a thin layer of linoleum mounted on wood; in this the design to be printed is cut in the same manner as for a woodcut . The advantage of linoleum cuts lies in the softness of ...
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hashish
hashish , resin extracted from the flower clusters and top leaves of the hemp plant, Cannabis sativa, and C. indica. Hashish, called charas in India, is the most potent grade of cannabis and is obtained from cultivated plants grown in hot, moist climates. Marijuana , a cheaper and less potent s...
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slate
slate fine-grained rock formed when sedimentary rocks such as shale are metamorphosed by great pressure. Slate splits into perfectly cleaved, broad thin layers; this characteristically regular and planar cleavage is called slaty cleavage. In the formation of slate, pressure causes the flaky min...
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Curtis Emerson LeMay
Curtis Emerson LeMay , 1906-90, U.S. general, b. Columbus, Ohio. Commissioned a second lieutenant in the U.S. army air corps in 1930, he advanced through grades and in World War II commanded a bomber group in Europe and later the 20th Air Force in the Pacific. After the war he served (1945-47) as de...
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lumber
lumber term for timber that has been cut into boards for use as a building material. The major steps in producing lumber involve logging (the felling and preparation of timber for shipment to sawmills), sawing the logs into boards, grading the boards according to defects and intended use, drying, a...
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Manila hemp
Manila hemp the most important of the cordage fibers. It is obtained chiefly from the Manila hemp plant ( Musa textilis ) of the family Musaceae ( banana family). It is grown mainly in its native Philippine Islands, where it has been cultivated since the 16th cent. and is known as abacá. Th...
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elementary school
el·e·men·ta·ry school
•
n.
a school for the first four to six grades, and usually including kindergarten.
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sandpaper
sandpaper abrasive originally made by gluing grains of sand to heavy paper sheets. Today sandpaper is made primarily with quartz, aluminum oxide, or silicon carbide grains, and is graded according to the size of the grains. It is used for smoothing and polishing, for removing old paint or varnish, ...
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