sulcus

Borrowed from Latin sulcus.

• IPA^(key): /ˈsʌl.kəs/

sulcus (plural sulci)

1. (anatomy) A furrow or groove in an organ or a tissue.
2. (anatomy) Any of the grooves that mark the convolutions of the surface of the brain.
   • 1999, Thomas C. Pritchard, Kevin D. Alloway, Medical Neuroscience, page 55,

     The largest sulcus, the longitudinal fissure, divides the brain into left and right hemispheres.

   • 2006, Inderbir Singh, Textbook of Human Neuroanatomy, 7th 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, 10th Edition, page 213,

     The large surface area of the human cerebral cortex results in a pattern of gyri and sulci.

3. (planetology) A region of subparallel grooves or ditches formed by a geological process.

• (furrow in an organ or tissue):
• (groove marking a convolution of the brain's surface): fissure
• (region of subparallel grooves or ditches formed by a geological process):

• gyrus

From Proto-Indo-European *solk-o- (“furrow”), *selk- (“to pull, drag”), whence also Old English sulh.

• (Classical) IPA^(key): /ˈsul.kus/, [ˈsʊɫ.kʊs]

sulcus m (genitive sulcī); second declension

1. furrow
2. ploughing

Second declension.

• sulcus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• sulcus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• sulcus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• sulcus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
• De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill