Word.ws English Dictionary

P99

P99 noun: p99 standard.

Noun

P99 (countable and uncountable, plural P99s)

  1. (uncountable) P99 standard
  2. (countable) P99 filter

Forms of P99

pluralP99s

Origin of P99

From Initialism of oil-Proof with 99% filtration efficiency in NIOSH air filtration ratings.

Questions about P99

What does P99 mean?
P99 means p99 standard.
What part of speech is P99?
P99 is a noun.
What is the plural of P99?
The plural of P99 is P99s.

Words near P99 in the dictionary

  1. P5s
  2. P60
  3. P60s
  4. P95
  5. P95s
  6. P99
  7. P99s
  8. pa
  9. PA cage
  10. pa chew cheng
  11. pa rum pum pum pum

Source and license

Adapted from Wiktionary: P99 (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “P99.” Word.ws, https://word.ws/p99. Based on Wiktionary, CC BY-SA 4.0.