The term "parieto-occipital fissure" refers to a deep groove that separates the parietal and occipital lobes of the brain. This structure is also sometimes called the "parieto-occipital sulcus." While there are no true synonyms for this term, it can be referred to by related terminology. For example, the term "sulcus" may be used to describe any groove or furrow in the brain's surface. Additionally, the anatomy of the fissure may be described in terms of its location, such as the "interhemispheric" or "lateral" parieto-occipital fissure. Other related terms include "cortical sulci" and "brain fissures".