Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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No pronunciation record was provided for this word.
noun
R100; Ellipsis of NIOSH R100.
R100 standard
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
R100; Ellipsis of NIOSH R100.
R100 filter
Definition source: English Wiktionary via Wiktextract
Usage: countable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From Initialism of Resistant to oil particles with 100% filtration efficiency in NIOSH air filtration ratings.
