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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsʌl kəs)

n., pl. -ci (-sī).
Anat. a groove or fissure, esp. a fissure between two convolutions of the brain.
[1655–65; Latin: furrow]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Initial and final intraocular lens positions Intraocular lens location Initial (%) Final (%) Anterior chamber 20.8 22.9 Sulcus 50 27.1 Intracapsular 27.1 8.3 Scleral fixation 2.1 10.4 None (aphakic) -- 29.1 Table 5.
It's on the right side of the brain behind the ear, in a region called the posterior superior temporal sulcus (pSTS).
The area is called the posterior superior temporal sulcus (pSTS).
The fractures were reduced with upper buccal sulcus approach by dental instrument.
Intraoperatively, the tumor was completely buried in a sulcus in the parietal-occipital-temporal region.
Los otolitos derechos se fotografiaron con microscopio estereoscopio (Leica[R] EZ4-HD) y se registraron las siguientes variables morfometricas sobre las imagenes mediante el procesador de imagenes Image-ProPlus[R] 4.5: longitud del otolito (LO), ancho (AO), perimetro del sulcus (PS) y perimetro (PO) en mm y superficie del otolito (SO) y superficie del sulcus (SS) en [mm.sup.2].
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.
A pair of small pale tubercles on the pronotal disc just anterior to the posterior sulcus. Lateral carinae strong, straight, diverging towards the rear, deeply cut by the three transverse sulci, but obsolete near the hind margin of the metazona.
It was embarrassing, it was really hard." Connie was struck by throat condition sulcus vocalis and used cortico-steroids to ease swelling of her vocal cords after surgery - taking ever larger doses.
Sulcus extending full length of grain, narrow near the distal pole, margins of sulcus may slightly or strongly overlap.
It may be easily accessed using a single sulcus incision that also enables harvesting of ear cartilage grafts.