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Angel dust may refer to: 1  A common name for the drug phencyclidine (PCP). 2  A common name for the drug clenbuterol. 3  Angel dusting, the misleading marketing practice of including a minuscule amount of an active ingredient in a cosmetic, nutritional supplement, or food product, insufficient to cause any measurable benefit.
Coined by University of California, Berkeley professor Kristofer Pister, the term âsmart dustâ refers to tiny electronic bundles of power, sensors, computing and communications electronics that are cheap and abundant enough to scatter like, well, dust.