sulcus

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sulcus

 [sul´kus] (L.)
a groove or furrow; used in anatomic nomenclature to designate a linear depression, especially one of the cerebral sulci.
basilar sulcus a groove in the midline of the anterior surface of the pons, lodging the basilar artery.
calcarine sulcus a sulcus of the medial surface of the occipital lobe, separating the cuneus from the lingual gyrus.
central sulcus fissure of Rolando.
cerebral sulci the furrows on the surface of the brain between the gyri (see gyrus).
Cerebral sulci, showing some major ones on the superolateral surface of the left cerebral hemisphere. From Dorland's, 2000.
collateral sulcus collateral fissure.
sul´ci cu´tis fine depressions of the skin between the ridges of the skin.
gingival sulcus the space between the surface of the tooth and the epithelium lining the free gingiva.
hippocampal sulcus hippocampal fissure.
posterior median sulcus posterior median fissure.

sul·cus

, gen. and pl.

sul·ci

(sūl'kŭs, sŭl'sī),
1. One of the grooves or furrows on the surface of the brain, bounding the several convolutions or gyri; a fissure.
See also: fissure.
See also: groove.
2. Any long narrow groove, furrow, or slight depression.
See also: groove.
3. A groove or depression in the oral cavity or on the surface of a tooth.
[L. a furrow or ditch]

sulcus

(sŭl′kəs)
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.

sul·cus

, gen. and pl. sulci (sŭl'kŭs, -sī)
1. One of the grooves or furrows on the surface of the brain, bounding the several convolutions or gyri; a fissure.
See also: fissure
2. Any long, narrow groove, furrow, or slight depression.
See also: groove
3. A groove or depression in the oral cavity or on the surface of a tooth.
4. The healthy space between the marginal gingiva and a tooth; a space not exceeding 3 mm is considered healthy.
Synonym(s): gingival sulcus.
[L. a furrow or ditch]

sulcus

A narrow fissure or groove especially one of the furrows that separates adjacent convolutions (gyri) on the surface of the brain.

sulcus

a groove or fissure.

sulcus 

A depression or a groove found on the surface of an organ or tissue, as on the surface of the brain separating adjacent convolutions. Large sulci that divide the brain into lobes as well as the two hemispheres are more often called fissures. Plural: sulci. See fissure.
calcarine sulcus See calcarine fissure.
ciliary sulcus A groove situated between the posterior root of the iris and the ciliary body. It may be used, sometimes, as a site of fixation of an intraocular lens implant. See intraocular lens.
inferior palpebral sulcus A furrow in the skin of the lower eyelid. It separates the tarsal from the orbital portion of the lid. It is often not very distinct although it becomes more so with age.
internal scleral sulcus A slight, circular groove situated at the margin between the posterior surface of the cornea and the sclera. It contains the trabecular meshwork and the canal of Schlemm. The posterior lip of the sulcus forms a projecting ridge called the scleral spur. See scleral spur.
optic sulcus See optic pit.
subtarsal sulcus A groove on the inner surface of the eyelid, near the eyelid margin and parallel to it, which forms the border separating the marginal from the tarsal conjunctiva. Foreign bodies are commonly lodged in this groove. See lid eversion; irrigation.
superior palpebral sulcus A furrow in the skin of the upper eyelid. It separates the tarsal portion, which is closest to the lid margin from the orbital portion, which extends from the tarsus to the eyebrow. This furrow becomes more prominent with age. See palpebral aperture.

sul·cus

, gen. and pl. sulci (sŭl'kŭs, -sī)
1. [TA] Groove or depression in oral cavity or on tooth surface.
2. [TA] One of the grooves or furrows on surface of brain, bounding several convolutions or gyri; a fissure.
3. [TA] Any long narrow groove, furrow, or slight depression.
[L. a furrow or ditch]