sulcus
/ˈsʌlkəs/
noun
- A groove or furrow, especially in the surface of the brain or other organs.
- Doctors examined the sulcus on the patient's brain scan.
- Each sulcus on the brain's surface helps increase its surface area.
- The central sulcus separates the frontal lobe from the parietal lobe.
- A long, narrow groove on a surface, such as on a tooth or a plant stem.
- The seed's sulcus helps it split open when it germinates.
- The dentist pointed out a small sulcus on the molar.
- The leaf had a distinct sulcus running down its center.