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R99. In DICTIOUS you will not only get to know all the dictionary meanings for the word
R99, but we will also tell you about its etymology, its characteristics and you will know how to say
R99 in singular and plural. Everything you need to know about the word
R99 you have here. The definition of the word
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Translingual
Etymology
English R99
Noun
R99
- A filtration type that efficiently filters out 99% of airborne particulates of 0.3 microns (“μm”) (and all larger particles) and is somewhat resistant to oil.
- A filter implementing the R99 standard.
Coordinate terms
English
Etymology
From Initialism of Resistant to oil particles with 99% filtration efficiency in NIOSH air filtration ratings.
Noun
R99 (countable and uncountable, plural R99s)
- R99; Ellipsis of NIOSH R99.
- (uncountable) R99 standard
- (countable) R99 filter
Coordinate terms
- N99 (non-oil-resistant filter standard)
- P99 (oil-proof filter standard)