N100

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
N100; Ellipsis of NIOSH N100.; N100 standard uncountable
2
N100; Ellipsis of NIOSH N100.; N100 filter countable

Etymology

From Initialism of Not resistant to oil particles with 100% filtration efficiency in NIOSH air filtration ratings.

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