sulcus

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English[edit]

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Lateral sulcus (fissure on the surface of the brain)

Etymology[edit]

Borrowed from Latin sulcus (a furrow made by a plow). Doublet of sullow ("plough").

Pronunciation[edit]

Noun[edit]

sulcus (plural sulci)

  1. (anatomy) A furrow or groove in an organ or a tissue, especially that marking the convolutions of the surface of the brain.
    • 1999, Thomas C. Pritchard; Kevin D. Alloway, Medical Neuroscience[1], page 55:
      The largest sulcus, the longitudinal fissure, divides the brain into left and right hemispheres.
    • 2006, Inderbir Singh, Textbook of Human Neuroanatomy[2], 7 edition, page 72:
      Unlike most other sulci, the lateral sulcus is very deep.
    • 2014, John Kiernan; Raj Rajakumar, Barr's The Human Nervous System: An Anatomical Viewpoint[3], 10 edition, page 213:
      The large surface area of the human cerebral cortex results in a pattern of gyri and sulci.
    Synonym: fissure
    Coordinate term: gyrus
    Hyponyms: calcaneal sulcus, central sulcus, cingulate sulcus, coronal sulcus, cruciate sulcus, interlabial sulcus, intermammary sulcus, lacrimal sulcus, lateral sulcus, malleolar sulcus, postcentral sulcus, preauricular sulcus, precentral sulcus, radial sulcus, sagittal sulcus, sigmoid sulcus, sulcus ansatus, sulcus arteriae vertebralis, sulcus tubae auditivae, tympanic sulcus
  2. (planetology) A region of subparallel grooves or ditches formed by a geological process.

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Latin[edit]

Etymology[edit]

From Proto-Italic *solkos, from Proto-Indo-European *solk-o-s (furrow), *selk- (to pull, drag), whence also Old English sulh. Doublet of holcus.

Pronunciation[edit]

Noun[edit]

sulcus m (genitive sulcī); second declension

  1. (agriculture) A furrow made by a plow.
    Synonyms: līra, porca
  2. (transferred sense):
    1. (agriculture) Ploughing.
    2. (of things resembling a furrow):
      1. A long, narrow trench; a ditch.
      2. (in general) A rut or track.

Inflection[edit]

Second-declension noun.

Case Singular Plural
Nominative sulcus sulcī
Genitive sulcī sulcōrum
Dative sulcō sulcīs
Accusative sulcum sulcōs
Ablative sulcō sulcīs
Vocative sulce sulcī

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