norepinephrine

noun

nor·​epi·​neph·​rine ˈnȯr-ˌe-pə-ˈne-frən How to pronounce norepinephrine (audio)
: a monoamine C8H11NO3 that is a neurotransmitter in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway

Example Sentences

Recent Examples on the Web Movement is also proven to be beneficial in stabilizing mood, which is essential as PD impacts the areas of the brain that produce dopamine, serotonin, and norepinephrine. Malissa Rodenburg, Outside Online, 31 Oct. 2022 First there were tricyclic antidepressants, then there were SSRIs like Prozac and SNRIs like Cymbalta, drugs that target neurotransmitters such as serotonin and norepinephrine. Thomas Curwen, Los Angeles Times, 2 Oct. 2022 Another neuromodulator, norepinephrine, is greatly reduced in REM sleep. Steven Strogatz, Quanta Magazine, 24 Aug. 2022 Intense exercise helps release serotonin, dopamine and norepinephrine, all of which give you motivation and focus. Yec, Forbes, 18 Aug. 2022 Today, millions of Americans are on antidepressants—not just SSRIs, but other serotonin, dopamine, and norepinephrine modulators. Eleanor Cummins, The New Republic, 10 Aug. 2022 However, for people who can’t tolerate SSRIs, serotonin-norepinephrine reuptake inhibitors (SNRIs) function similarly and offer another potential option for treatment. Eleesha Lockett, SELF, 18 Nov. 2021 Like many other forms of exercise, running increases concentrations of norepinephrine, a chemical that helps our brains modulate our stress responses. Outside Online, 1 Dec. 2020 But since the 1970s, it’s been thought that norepinephrine is not involved in this system during certain stages of sleep. Quanta Magazine, 22 Mar. 2022 See More

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

Word History

First Known Use

1937, in the meaning defined above

Time Traveler
The first known use of norepinephrine was in 1937

Dictionary Entries Near norepinephrine

Cite this Entry

“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 28 Nov. 2022.

Kids Definition

norepinephrine

noun

nor·​epi·​neph·​rine ˈnȯ(ə)r-ˌep-ə-ˈnef-rən How to pronounce norepinephrine (audio)
: a hormone that causes blood vessels to contract and helps to transmit nerve impulses in the sympathetic nervous system and in some parts of the central nervous system

Medical Definition

norepinephrine

noun

nor·​epi·​neph·​rine ˌnȯr-ˌep-ə-ˈnef-rən How to pronounce norepinephrine (audio) -rēn How to pronounce norepinephrine (audio)
: a catecholamine C8H11NO3 that is the chemical means of transmission across synapses in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway

called also arterenol, noradrenaline

see levophed

More from Merriam-Webster on norepinephrine

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