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Moment of truth
The word 'nanotechnology' is first coined by University of Tokyo researcher Norio Taniguchi back in 1974.


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pycnometer Phys.
See density bottle

pyrite Min.
iron pyrite mineral A mineral of iron sulfide (FeS2) with a shiny, brassy luster. It is commonly referred to as 'fool's gold' because of its superficial resemblance in appearance to gold. However, pyrite is a very common mineral, with a hardness of 6.5, and can be found in almost anywhere in the Earth's crust. It is mined, in small scale, to produce sulfuric acid.


pyrolysis Chem.
Decomposition of a substance as a result of high temperature. The nature of substance is completely altered since pyrolysis is a chemical process involving breaking of chemical bonds. This is in contrast to physical vaporization of a substance, which upon cooling, identical substance may be recovered (physical process).

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