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R factor

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noun
  1. a genetic component of some bacteria that provides resistance to antibiotics and can be transferred from one bacterium to another by conjugation.

Origin of R factor

1960–65; r(esistance) factor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
r factor in Medicine

R factor

n.
  1. resistance plasmid

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