norepinephrine

noun
nor·​epi·​neph·​rine | \ ˈnȯr-ˌe-pə-ˈne-frən How to pronounce norepinephrine (audio) \

Definition of norepinephrine

: 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 Antidepressants: By working on the level of serotonin and norepinephrine in your brain, certain types of antidepressants can actually curb migraine episodes. Korin Mille, SELF, 6 Aug. 2021 Scientific American previously highlighted that the body produces near-zero levels of one crucial memory neurotransmitter, known as norepinephrine, during sleep. Zee Krstic, Good Housekeeping, 19 July 2021 In up to a third of patients with major depression, standard medications that block receptors for the key neurotransmitters, serotonin and norepinephrine, are not effective. Robert Glatter, Forbes, 10 June 2021 There, the brain produces norepinephrine, a fight-or-flight chemical that increases alertness and decreases pain and tiredness. Maddie Bender, Scientific American, 10 June 2021 Epinephrine and norepinephrine mediate the physiological changes associated with stress and are elevated in stressful situations. The Conversation, oregonlive, 3 Apr. 2021 Epinephrine and norepinephrine mediate the physiological changes associated with stress and are elevated in stressful situations. The Conversation, oregonlive, 3 Apr. 2021 Epinephrine and norepinephrine mediate the physiological changes associated with stress and are elevated in stressful situations. The Conversation, oregonlive, 3 Apr. 2021 Epinephrine and norepinephrine mediate the physiological changes associated with stress and are elevated in stressful situations. The Conversation, oregonlive, 3 Apr. 2021

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.

See More

First Known Use of norepinephrine

1937, in the meaning defined above

Keep scrolling for more

Learn More About norepinephrine

Time Traveler for norepinephrine

Time Traveler

The first known use of norepinephrine was in 1937

See more words from the same year

Dictionary Entries Near norepinephrine

norephedrine

norepinephrine

norethindrone

See More Nearby Entries 

Statistics for norepinephrine

Last Updated

17 Aug 2021

Cite this Entry

“Norepinephrine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/norepinephrine. Accessed 21 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for norepinephrine

norepinephrine

noun
nor·​epi·​neph·​rine | \ ˌnȯr-ˌep-ə-ˈnef-rən How to pronounce norepinephrine (audio) , -rēn How to pronounce norepinephrine (audio) \

Medical Definition of norepinephrine

: 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

Britannica.com: Encyclopedia article about norepinephrine

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!