Dictionary

HEPA

adjective \ˈhe-pə\

Definition of HEPA

:  being, using, or containing a filter usually designed to remove 99.97% of airborne particles measuring 0.3 micrometers or greater in diameter passing through it

Origin of HEPA

high-efficiency particulate air (filter)
First Known Use: 1983

HEPA

adjective \ˈhep-ə\   (Medical Dictionary)

Medical Definition of HEPA

:  being, using, or containing a filter usually designed to remove 99.97% of airborne particles measuring 0.3 microns or greater in diameter passing through it <HEPA filters> <HEPA vacuum cleaners>

Origin of HEPA

high efficiency particulate air

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