Sulcus (Latin for "furrow"; pl. sulci) may refer to:

  • Sulcus primigenius, the sacred furrow created at the foundation of Roman cities in antiquity
  • Gingival sulcus, the space between a tooth and surrounding tissue
  • Gluteal sulcus, the horizontal crease in humans and certain other primates where the lower end of the buttocks join the thigh
  • Sulcus (morphology), a groove, crevice or furrow in medicine, botany, and zoology
  • Sulcus (neuroanatomy), a crevice on the surface of the brain
  • Sulcus (geology), a long parallel groove on a planet or a moon
  • Coronal sulcus, the groove under the corona of the glans penis
  • In botany, sulci in seeds or pollen grains are colpi

See also edit