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R factor

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WordReference Random House Unabridged Dictionary of American English © 2026

R factor,

Geneticsa genetic component of some bacteria that provides resistance to antibiotics and can be transferred from one bacterium to another by conjugation. Also called resistance transfer factor, RTF

r(esistance) factor 1960–65

'R factor' also found in these entries (note: many are not synonyms or translations):

resistance transfer factor - RTF

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