Sulcus
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Sulcus (pl. sulci) is a Latin word :
- used in Latin to refer to a groove, furrow or trench.
- used in planetary geology to refer to subparallel grooves and ditches formed by geological processes. See Sulcus (geology)
- used in medicine to refer to grooves, crevices, and furrows. e.g., superior pulmonary sulcus See Sulcus (anatomy)