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R factor

American  

noun

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

Etymology

Origin of R factor

1960–65; r(esistance) factor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The ratio d / k is called the R factor.

From Textbooks • Aug. 12, 2015

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.