sulcus

[ suhl-kuh s ]

/ ˈsʌl kəs /

noun, plural sul·ci [suhl-sahy] /ˈsʌl saɪ/.

a furrow or groove.

Anatomy. a groove or fissure, especially a fissure between two convolutions of the brain.

Nearby words

sukkur, sukuk, sukuma, sulawesi, sulcate, sulcus, sulcus of sclera, suleiman i, sulf-, sulfa, sulfa drug

Origin of sulcus

1655–65; Latin: furrow

Related forms

sub·sul·cus, noun, plural sub·sul·ci.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sulci

The brain (Fig. 53) is marked by sulci, contrary to what we find in Ornithorhynchus.
The Cambridge Natural History, Vol X., Mammalia|Frank Evers Beddard
The pearly lustre (in the dry state) owing without doubt to the minute sulci on the backs of the cells.
Narrative Of The Voyage Of H.M.S. Rattlesnake, Commanded By The Late Captain Owen Stanley, R.N., F.R.S. Etc. During The Years 1846-1850. Including Discoveries And Surveys In New Guinea, The Louisiade Archipelago, Etc. To Which Is Added The Account Of Mr. E.B. Kennedy's Expedition For The Exploration Of The Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist To The Expedition. In Two Volumes. Volume 1.|John MacGillivray
The lymph was purely basal, solely on the arachnoid, not in the fissures or sulci.
A History of Epidemics in Britain, Volume II (of 2)|Charles Creighton
The sulcus is bifurcate; the fork is near the base and almost gives the appearance of two sulci on some specimens.
A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)|John Wellman

Gyrus, jī′rus, n. one of the rounded edges into which the surface of the cerebral hemisphere is divided by the fissures or sulci.
Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)|Various

British Dictionary definitions for sulci

sulcus

/ (ˈsʌlkəs) /

noun plural -ci (-saɪ)

a linear groove, furrow, or slight depression

any of the narrow grooves on the surface of the brain that mark the cerebral convolutionsCompare fissure

Word Origin for sulcus

C17: from Latin

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for sulci

sulcus

[ sŭl′kəs ]

n. pl. sul•ci (-kī, -sī)

Any of the grooves on the brain surface, bounding the gyri; a fissure.

A long narrow groove or depression, as in an organ or a tissue.

Related forms

sul′cal adj.