sulcus

noun
sul·​cus | \ˈsəl-kəs \
plural sulci\ ˈsəl-​ˌkī , -​ˌkē, -​ˌsī \

Definition of sulcus 

: furrow, groove especially : a shallow furrow on the surface of the brain separating adjacent convolutions

Examples of sulcus in a Sentence

Recent Examples on the Web

The key is a structure called the lunate sulcus, which is part of the primary visual cortex. Kiona N. Smith, Ars Technica, "Homo naledi’s brain: Like ours, but smaller," 14 May 2018 That difference affects the size and position of the lunate sulcus. Kiona N. Smith, Ars Technica, "Homo naledi’s brain: Like ours, but smaller," 14 May 2018 The central sulcus is a critical area that separates the region responsible for much of our motor function from the region that regulates input of sensory stimuli, Roberts said. Ashley Strickland, CNN, "Long-term spaceflight 'squeezes' the brain, study says," 1 Nov. 2017 Seventeen of the 18 long-term astronauts experienced a narrowing of the central sulcus in the brain. Ashley Strickland, CNN, "Long-term spaceflight 'squeezes' the brain, study says," 1 Nov. 2017

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

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First Known Use of sulcus

1662, in the meaning defined above

History and Etymology for sulcus

Latin; akin to Old English sulh plow, Greek holkos furrow, helkein to pull

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The first known use of sulcus was in 1662

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More Definitions for sulcus

sulcus

noun
sul·​cus | \ˈsəl-kəs \
plural sulci\ -​ˌkī , -​ˌsī \

Medical Definition of sulcus 

: furrow, groove especially : a shallow furrow on the surface of the brain separating adjacent convolutions — compare fissure sense 1c

More from Merriam-Webster on sulcus

Britannica.com: Encyclopedia article about sulcus

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