# sulcus

> English word · Noun · IPA /ˈsʌl.kəs/ · frequency rank #67,088

## Definitions
1. A furrow or groove in an organ or a tissue, especially that marking the convolutions of the surface of the brain.
2. A region of subparallel grooves or ditches formed by a geological process.

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sulcus