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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 ?
The major branches of the coronary arteries are typically subepicardial, however, those in the coronary sulcus are deeply sited and frequently embedded in the myocardium (Snell, 2012; Standring et al.
9) Juvederm Ultra XC was injected along the entire length of the superior sulcus deep to the orbital septum in 10 eyelids.
Results: Significant differences among vertical patterns were observed for the 'gnathion', 'menton', 'stomion' and 'inferior sulcus to H line' when both genders were combined.
The H angle, Soft tissue facial angle, Nose prominence, Upper lip sulcus depth (upper lip curl), Basic upper lip thickness, Upper lip thickness, Upper lip strain, Skeletal profile convexity, Soft tissue subnasale to H line, Lower lip to H line, Inferior sulcus to the H line (lower lip sulcus depth), and Soft tissue chin thickness measurements were analyzed using the definitions provided by Holdaway10 (Fig 1).
These activities all exercise the occipital lobe, the temporal lobe the temporal sulcus and the amygdala parts of the brain, responsible for visual recognition and short-term memory.
Podagricomela, closely allied to Amphimela, is separated from the latter by the deep, transverse suprafrontal sulcus separating vertex from frontal ridge (vertex in Amphimela is inseparable from frontal ridge as there is no transverse suprafrontal sulcus separating the 2 sclerites).
Early results of posterior chamber intraocular lens (PC IOL) implantation in the ciliary sulcus appeared better in comparison to iris supported and anterior chamber (AC) lenses.
It explains a generic technique for reconstruction, consisting of two-stage autologous ear reconstruction involving the reproduction of the missing contours and creation of the retroauricular sulcus, then reconstruction for microtia and traumatic injury.
For shallow subgingival cleaning, the PLUS handpiece is directed at the sulcus to quickly clean all biofilm up to 4mm.
Calculations using biometric measurements for both the sulcus and the bag were done to determine the power of the IOL to be implanted.