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n. pl. sul·ci (-kī, -sī)
1. A deep, narrow furrow or groove, as in an organ or tissue.
2. Any of the narrow fissures separating adjacent convolutions of the brain.


sul′cal adj.


n, pl -ci (-saɪ)
1. a linear groove, furrow, or slight depression
2. (Anatomy) any of the narrow grooves on the surface of the brain that mark the cerebral convolutions. Compare fissure
[C17: from Latin]


(ˈsʌl kəs)

n., pl. -ci (-sī).
Anat. a groove or fissure, esp. a fissure between two convolutions of the brain.
[1655–65; Latin: furrow]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sulcus - (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
fissure - (anatomy) a long narrow slit or groove that divides an organ into lobes
central sulcus, fissure of Rolando, Rolando's fissure, sulcus centralis - a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes
fissure of Sylvius, lateral cerebral sulcus, sulcus lateralis cerebri, Sylvian fissure - the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
parieto-occipital fissure, parieto-occipital sulcus - a sulcus near the posterior end of each hemisphere that separates the parietal lobes and the occipital lobes in both hemispheres
calcarine fissure, calcarine sulcus - a sulcus in the mesial surface of the occipital lobe of the cerebrum
anatomy, general anatomy - the branch of morphology that deals with the structure of animals
References in periodicals archive ?
It launched a successful career, but in 2011 she was diagnosed with congenital sulcus vocalis - holes in the vocal cords - and has undergone three operations.
The ergonomically-designed grip fits comfortably and securely in your hand and positions the patented "W cut" tapered bristles into the correct 45 degree alignment to reach into and clean the sulcus while simultaneously cleaning the tooth.
Designed by a dental hygienist and dentist, the new MD*Brush is specifically crafted to target the gingival sulcus by guiding the user to employ the Modified Bass Technique.
2); longitudinal sulcus gradually wide from top to bottom, the width slightly narrower than the width of antennal scape.
Consistent with other studies, Parvizi's team found that electrical activity in a particular group of nerve cells in the intraparietal sulcus spiked when, and only when, volunteers were performing calculations.
1) At enrollment, there were no differences between men randomly assigned to receive circumcision immediately and men assigned to delay circumcision for two years in terms of the bacteria from their penile coronal sulcus (i.
Strobovideolaryngoscopy revealed bilateral sulcus vocalis (figure 1).
In the new study, the researchers examined jets from the warmest regions of two tiger stripes, called Baghdad Sulcus and Damascus Sulcus.
Fisher said: "After many months of battling with a throat condition, known as congenital sulcus vocalis, my vocal range has altered and it is with much regret that I have to withdraw from the show.
On its exterior surface, a single sulcus marks the midline suture between humeral scutes.