DEFINITIONS
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R factor

noun

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

Content related to R factor

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Where Did African American Vernacular English Come From?AAVE is unfairly stigmatized and sometimes labeled "bad English." But, the grammar is actually as complex as Standard American English (SAE), possibly even more so, and with different rules.
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Origin of R factor

1960–65; r(esistance) factor
Also called resistance transfer factor, RTF
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for r factor

R factor

n.

resistance plasmid
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.