R100

noun

R100 standard

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Meanings

nounR100 (countable and uncountable, plural R100s)

plural R100s

  1. R100; Ellipsis of NIOSH R100.
    1. uncountableR100 standard
    2. countableR100 filter

Origin

From Initialism of Resistant to oil particles with 100% filtration efficiency in NIOSH air filtration ratings.

Full word history & related roots →
Cite this entry
APA

R100. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/R100

MLA

“R100.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/R100. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “R100,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/R100.

Source: R100 on Wiktionary, CC BY-SA 4.0.