P100

noun

P100 standard

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Meanings

nounP100 (countable and uncountable, plural P100s)

plural P100s

  1. P100; Ellipsis of NIOSH P100.
    1. uncountableP100 standard
    2. countableP100 filter

Origin

From Initialism of oil-Proof with 100% filtration efficiency in NIOSH air filtration ratings.

Full word history & related roots →
Cite this entry
APA

P100. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/P100

MLA

“P100.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/P100. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “P100,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/P100.

Source: P100 on Wiktionary, CC BY-SA 4.0.