norepinephrine
noun
nor·epi·neph·rine
ˈnȯr-ˌe-pə-ˈne-frən 
: 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
Examples of norepinephrine in a Sentence
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Neurotransmitters like oxytocin, dopamine and norepinephrine are all released, each of which contribute to the feeling of attachment and reward.
—
Mark Travers, Forbes.com, 7 Apr. 2025
The medications work by amplifying the activity of the neurotransmitters dopamine and norepinephrine in the nerve cells of the brain.
—Christina Caron, New York Times, 27 Mar. 2025
As the name suggests, SNRIs work on two specific neurotransmitters: Serotonin and norepinephrine.
—Mary Walrath-Holdridge, USA TODAY, 13 Dec. 2024
Mood Changes Amino acids—the building blocks of proteins—are essential for producing mood-regulating neurotransmitters (brain chemicals) like serotonin and norepinephrine.
—Colleen Doherty, Verywell Health, 18 Dec. 2024
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Mark Travers, Forbes.com, 7 Apr. 2025
The medications work by amplifying the activity of the neurotransmitters dopamine and norepinephrine in the nerve cells of the brain.
—Christina Caron, New York Times, 27 Mar. 2025
As the name suggests, SNRIs work on two specific neurotransmitters: Serotonin and norepinephrine.
—Mary Walrath-Holdridge, USA TODAY, 13 Dec. 2024
Mood Changes Amino acids—the building blocks of proteins—are essential for producing mood-regulating neurotransmitters (brain chemicals) like serotonin and norepinephrine.
—Colleen Doherty, Verywell Health, 18 Dec. 2024
See All Example Sentences for norepinephrine
Cite this Entry
“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 22 Apr. 2025.
Copy CitationKids Definition
norepinephrine
noun
nor·epi·neph·rine
ˈnȯ(ə)r-ˌep-ə-ˈnef-rən
: 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
-rēn
-rēn
: 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
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Merriam-Webster unabridged
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