precipitron

noun

pre·​cip·​i·​tron

prēˈsīpə‧ˌträn,

prə̇ˈs-

plural precipitrons

: an electrostatic air-cleaning apparatus that ionizes floating particles of dust, pollen, fumes, and smoke and then precipitates the particles on charged collecting elements usually in the form of plates

—formerly a U.S. registered trademark

Word History

First Known Use

1938, in the meaning defined above

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