P99

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    P99; Ellipsis of NIOSH P99.; P99 standard uncountable
  2. 2
    P99; Ellipsis of NIOSH P99.; P99 filter countable

Etymology

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

More for "p99"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.