\ ˈhe-pə How to pronounce HEPA (audio) \

Definition of HEPA

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

First Known Use of HEPA

1965, in the meaning defined above

History and Etymology for HEPA

high-efficiency particulate air (filter)

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Cite this Entry

“HEPA.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/HEPA. Accessed 23 January 2020.

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More Definitions for HEPA

\ ˈhep-ə How to pronounce HEPA (audio) \

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

History and Etymology for HEPA

high efficiency particulate air

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