sulcus

noun
sul·​cus | \ ˈsəl-kəs How to pronounce sulcus (audio) \
plural sulci\ ˈsəl-​ˌkī How to pronounce sulcus (audio) , -​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 According to the findings in the paper, Lucy’s brain looked like an ape’s brain but seemingly exhibited a structure called a lunate sulcus. Daisy Hernandez, Popular Mechanics, "Early Human Skulls May Show a Big Step in Our Brain's Evolution," 6 Apr. 2020 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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Time Traveler for sulcus

Time Traveler

The first known use of sulcus was in 1662

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Statistics for sulcus

Cite this Entry

“Sulcus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sulcus. Accessed 16 Jan. 2021.

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More Definitions for sulcus

sulcus

noun
sul·​cus | \ ˈsəl-kəs How to pronounce sulcus (audio) \
plural sulci\ -​ˌkī How to pronounce sulcus (audio) , -​ˌsī How to pronounce sulcus (audio) \

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

Comments on sulcus

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