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Of or being a society or culture prior to the use of ceramics or pottery.
References in periodicals archive ?
There are non-oxide ceramic continuous fibers (rovings) are produced in the material system Si-C from a preceramic polymer solution in the dry spinning process under an inert gas atmosphere with 300, 500, or 1 000 continuous filaments with 200 tex (500 filaments).
The eggs of the Pacific broad tapeworm were reported from Preceramic cultures in Peru (2850-2500 bce) in Huarmey Valley and Huaca Prieta (7), as well as from Ceramic cultures (5).
Under the support of the Office of Naval Research work is being done towards an alternative by thermally decomposing preceramic polymers, such as polycarbynes and "polyborynes".
Starch grain evidence for the preceramic dispersals of maize and root crops into tropical dry and humid forests of Panama.
Although its dispersion pattern and chronological origin are not entirely clear, we propose a scenario framed in the Middle Holocene (between 7000 and 3000 BP grouping societies from the late Preceramic and the early Formative) to explain its origin and possible dispersal routes towards South America, suggesting origins in Northwestern Mesoamerica or its probable dispersion in this area.
No obvious weight loss was observed in the temperature of 800-1200[degrees]C as for the polyborazine/P-ddm thermosets, indicating that the carbonizing process is completed for the preceramic polymer modified thermosets.
The four skeletons found in the Quintana Roo caves "reveal migrations from southeastern Asia that were prior to the ones we knew about before, such as the Clovis migrations that probably came from northern Asia over the Bering Strait at the end of the Ice Age," says Arturo Gonzalez, Director of the Museo del Desierto de Coahuila and coordinator of a study on Preceramic Man in the Yucatan Peninsula.
They explain the development of polymer derived ceramics, the synthesis and properties of preceramic polymers, microstructure evolution and characterization, properties, processing and applications, and novel developments for future research.
1988 "The Late Preceramic and Initial Period", en Keatinge, Richard (ed.