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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
Recent Examples on the Web
Hypoglycemia triggers the release of the hormones epinephrine (adrenaline) and norepinephrine (noradrenaline) in your body.
—Anna Giorgi, Verywell Health, 29 Nov. 2024
That’s why stimulants such as Adderall and Ritalin, which increase norepinephrine more powerfully than everyday anxiety, have powerful energizing effects.
—Richard A. Friedman, The Atlantic, 29 July 2024
Amphetamines also increase the release of dopamine and norepinephrine from neurons.
—Kate Harrington, The Conversation, 25 July 2024
Both medications work by increasing dopamine and norepinephrine levels in the brain to help improve ADHD symptoms.
—T'keyah Bazin, Pharmd, Verywell Health, 29 Oct. 2024
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Word History
First Known Use
1937, in the meaning defined above
Dictionary Entries Near norepinephrine
Cite this Entry
“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 23 Dec. 2024.
Kids 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
: 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 levophedMore from Merriam-Webster on norepinephrine
Britannica.com: Encyclopedia article about norepinephrine
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