English Explanatory Dictionary

P99

English dictionary entry

Meanings

noun
  1. P99; Ellipsis of NIOSH P99.
  2. P99 standard
  3. P99 filter

Word forms

P99 P99s

Etymology

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

Related words

N99 R99
This entry uses open data from Wiktionary (CC BY-SA/GFDL). Word forms are used for search and are not indexed as separate pages.
Back to search All on P Russian dictionary Dahl dictionary