Definition of "sulcus" []

• A deep, narrow furrow or groove, as in an organ or tissue. (noun)
• Any of the narrow fissures separating adjacent convolutions of the brain. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The superior temporal sulcus is involved in processing very basic behavioural actions, whereas the prefrontal cortex is involved in more complex functions such as processing how decisions affect others."
• "Moreover, each lateral wall exhibits a division into a dorsal or alar and a ventral or basal lamina separated internally by a furrow termed the sulcus of Monro."
• "She was later diagnosed with a rare condition, known as sulcus vocalis."