suprachiasmatic nucleus

noun
su·pra·chi·as·mat·ic nucleus | \ ˌsü-prə-ˌkī-əz-ˈma-tik- \

Definition of suprachiasmatic nucleus 

: either of a pair of neuron clusters in the hypothalamus situated directly above the optic chiasma that receive photic input from the retina via the optic nerve and that regulate the body's circadian rhythms

Examples of suprachiasmatic nucleus in a Sentence

Recent Examples on the Web

Exposure to bright light stimulates the brain’s master clock — the suprachiasmatic nucleus — to wind back those three-tenths of an hour. Brian Resnick, Vox, "Why being a night owl may lead to earlier death," 27 Apr. 2018 Bright light, meanwhile, is known to alter the rhythms of the suprachiasmatic nucleus, as well as boosting activity in emotion-processing areas of the brain more directly. Linda Geddes, Smithsonian, "A Counterintuitive Idea for Treating Severe Depression: Stay Awake," 23 Jan. 2018

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

First Known Use of suprachiasmatic nucleus

1938, in the meaning defined above

Keep scrolling for more

Learn More about suprachiasmatic nucleus

Share suprachiasmatic nucleus

Statistics for suprachiasmatic nucleus

Look-up Popularity

Time Traveler for suprachiasmatic nucleus

The first known use of suprachiasmatic nucleus was in 1938

See more words from the same year

Keep scrolling for more

More Definitions for suprachiasmatic nucleus

suprachiasmatic nucleus

noun

Medical Definition of suprachiasmatic nucleus 

: either of a pair of neuron clusters in the hypothalamus situated directly above the optic chiasma that receive photic input from the retina via the optic nerve and that regulate the body's circadian rhythms abbreviation SCN

Comments on suprachiasmatic nucleus

What made you want to look up suprachiasmatic nucleus? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the setting in which something occurs

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

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!