
1) Fissure
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https://www.crosswordclues.com/clue/sulcus

1) Furrow
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https://www.crosswordclues.com/clue/sulcus
[geology] Sulcus (plural : sulci) is, in astrogeology, a long parallel groove on a planet or a moon. For example, Uruk Sulcus is a bright region of grooved terrain adjacent to Galileo Regio on Jupiter`s moon Ganymede. ...
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http://en.wikipedia.org/wiki/Sulcus_(geology)
[morphology] The term sulcus (pl. sulci) is a general descriptive term for a furrow or fissure. It is used in many disciplines, such as geology, but in morphological and anatomical connections it usually refers to a groove as a feature in the surface of a limb or an organ, notably in the surface of the brain, but also in the lungs, certain ...
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http://en.wikipedia.org/wiki/Sulcus_(morphology)
[neuroanatomy] ==Structure== In neuroanatomy, a sulcus (Latin: `furrow`, pl. sulci) is a depression or groove in the cerebral cortex. It surrounds a gyrus (pl. gyri), creating the characteristic folded appearance of the brain in humans and other mammals. Sulci are one of three parts of the cerebral cortex, the others being the gyri and the ...
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http://en.wikipedia.org/wiki/Sulcus_(neuroanatomy)

groove, furrow or fissure
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http://phrontistery.info/s.html

• (n.) A furrow; a groove; a fissure.
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http://thinkexist.com/dictionary/meaning/sulcus/

(from the article `human cardiovascular system`) Shallow grooves called the interventricular sulci, containing blood vessels, mark the separation between ventricles on the front and back surfaces of ... The dinoflagellate cell is banded by a median or coiled groove, the annulus, which contains a flagellum. A longitudinal groove, the sul...
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http://www.britannica.com/eb/a-z/s/182

a broad depression on the chewing surfaces of your back teeth.
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http://www.cosmeticdentistryguide.co.uk/glossary.html

see Gingival sulcus.
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http://www.encyclo.co.uk/local/20169

1. <anatomy> A groove or furrow, as one of the grooves on the surface of the cerebrum in mammals. ... 2. <zoology> In Dinoflagellata, a longitudinal groove in which a flagellum lies; in Anthozoa, the ventral siphonoglyph. ... (04 Mar 1998) ...
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http://www.encyclo.co.uk/local/20973

(sul´kәs) Latin word meaning furrow. In anatomy, it is used for a long groove or furrow, especially one of the cerebral sulci.
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http://www.encyclo.co.uk/local/21001
Sul'cus noun ;
plural Sulci . [ Latin , a furrow.] A furrow; a groove; a fissure.
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http://www.encyclo.co.uk/webster/S/235

Type: Term Pronunciation: sūl′kŭs, sŭl′sī Definitions: 1. One of the grooves or furrows on the surface of the brain, bounding the several convolutions or gyri; a fissure. 2. Any long narrow groove, furrow, or slight depression. 3. A groove or depression in the oral cavity or on the surface of a tooth.
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http://www.medilexicon.com/medicaldictionary.php?t=86278

Sulcus: A groove, crevice, or furrow. In medicine, there are many sulci (plural of sulcus) as, for example, the superior pulmonary sulcus. Sulcus is the Latin for groove, furrow, or trench.
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http://www.medterms.com/script/main/art.asp?articlekey=5588

(sul;kus) A shallow impression or groove.
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http://www.mhhe.com/biosci/abio/glossary.mhtml

Subparallel furrows and ridges.
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http://www.solarviews.com/eng/terms.htm

[
n] - (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
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http://www.webdictionary.co.uk/definition.php?query=sulcus

sulcus (s), sulci (pl) 1. Any of the narrow grooves in a bodily organ or tissue; especially, those that mark the convolutions on the surface of the brain. 2. A groove, crevice, or furrow. In medicine, there are many sulci; such as, for example, the superior pulmonary sulcus.
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http://www.wordinfo.info/words/index/info/view_unit/2065/
noun (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
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https://www.encyclo.co.uk/local/20974

Latin = a groove.
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https://www.encyclo.co.uk/local/21450

a furrow of convuluted brain surface (opposite of gyrus)
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https://www.encyclo.co.uk/local/22452

a furrow or groove. · a groove or fissure, esp. a fissure between two convolutions of the brain.
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https://www.infoplease.com/dictionary/sulcus
No exact match found.