The posterior clinoid process is a structure located in the skull base, specifically at the outer edge of the dorsum sellae of the sphenoid bone. It is an important landmark to locate the pituitary gland and internal carotid artery during neurosurgical procedures. Some of the synonyms for posterior clinoid process are mandibular process, petrous process, and occipital condyle. Other anatomical structures in this area include the anterior clinoid process, optic canal, and sellar diaphragm. Familiarity with these synonyms and associated landmarks is essential for efficient and safe neurosurgery.