Related topics from Britannicatool an instrument for making material changes on other objects, as by cutting, shearing, striking, rubbing, grinding, squeezing, measuring, or other process. A hand tool is a small manual instrument ...
flake tool Stone Age hand tools, usually flint, shaped by flaking off small particles, or by breaking off a large flake which was then used as the tool.machine tool any stationary power-driven machine that is used to shape or form parts made of metal or other materials. The shaping is accomplished in four general ways: (1) by cutting excess material in the form ...
hand tool any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to shaping tools, include such ...
Osteodontokeratic tool industry assemblage of fossilized animal bones found at Taung by Raymond Arthur Dart about 200 miles (320 km) from Johannesburg, S.Af., where the first specimen of Australopithecus africanus was found, and ...
Chopper chopping-tool industry certain stone tool traditions of Asia, probably of later Pleistocene age, characterized by roughly worked pebble chopper (q.v.) tools. These traditions include the Choukoutienian industry of China ...
tool and die making the industrial art of manufacturing stamping dies, plastics molds, and jigs and fixtures to be used in the mass production of solid objects.stone-tool industry any of several assemblages of artifacts displaying man's earliest technology, beginning more than 2 million years ago. These stone tools have survived in great quantities and now serve as the major ...
DNA-the Forensic Tool of the '90s The 1990s saw the evolution of one of law enforcement's greatest investigative tools-the use of DNA testing as evidence in criminal trials. First introduced in the courtroom in the late 1980s, this ...
pebble chopper primordial cutting tool, the oldest type of tool made by forerunners of modern humans. The tool consists of a rounded stone struck a number of blows with a similar stone used as a pounder, which ...
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