repressor

noun
re·​pres·​sor | \ ri-ˈpre-sər How to pronounce repressor (audio) \

Definition of repressor

: one that represses especially : a protein that is determined by a regulatory gene, binds to a genetic operator, and inhibits the initiation of transcription of messenger RNA

Examples of repressor in a Sentence

Recent Examples on the Web But no one had identified a full activator-repressor system involved in periodic pigmentation patterns. Elizabeth Pennisi, Science | AAAS, "Meet the monkeyflower, a weed that may hold the key to zebra stripes and other biological mysteries," 29 Aug. 2019 The cycle at the center of it—from gene activators to repressors and back—is highly regulated. John Timmer, Ars Technica, "Nobel Prize goes to researchers who figured out how our cells tell time," 2 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'repressor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of repressor

1584, in the meaning defined above

History and Etymology for repressor

New Latin

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Time Traveler for repressor

Time Traveler

The first known use of repressor was in 1584

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Cite this Entry

“Repressor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/repressor. Accessed 28 Sep. 2020.

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More Definitions for repressor

repressor

noun
re·​pres·​sor | \ ri-ˈpres-ər How to pronounce repressor (audio) \

Medical Definition of repressor

: one that represses especially : a protein that is determined by a regulatory gene, binds to a genetic operator, and inhibits the initiation of transcription of messenger RNA

More from Merriam-Webster on repressor

Britannica.com: Encyclopedia article about repressor

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