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HEPA

[hep-uh] /ˈhɛp ə/
adjective
1.
noting or using an air filter composed of a mat of dense fibers arranged in folds, designed according to federal standards to trap at least 99.97% of airborne particles measuring 0.3 microns in diameter:
HEPA vacuums and air purifiers.
Origin of HEPA
H(igh-)E(fficiency) P(articulate) A(ir)
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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