Sulcus

Sulcus (Latin for "furrow"; 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