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.
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anchorite
Also called resistance transfer factor, RTF
Origin of R factor
1960–65; r(esistance) factor
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Medical 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.