R factor

noun

: a group of genes present in some bacteria that provide a basis for resistance to antibiotics and can be transferred from cell to cell by conjugation

Word History

Etymology

resistance

First Known Use

1944, in the meaning defined above

Time Traveler
The first known use of R factor was in 1944

Dictionary Entries Near R factor

Cite this Entry

“R factor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/R%20factor. Accessed 23 Jun. 2024.

Medical Definition

R factor

noun
: a group of genes present in some bacteria that provide a basis for resistance to antibiotics and can be transferred from cell to cell by conjugation

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