The interventricular foramen is a small, yet essential opening that connects the two ventricles of the brain. While this anatomical structure may seem insignificant, its proper functioning is absolutely crucial for the exchange of cerebrospinal fluid, which is responsible for cushioning the brain and spinal cord. Some synonyms for interventricular foramen include foramen of Monro, cerebral aqueduct, ventricular aqueduct, and mesencephalic aqueduct. These terms are used interchangeably in order to describe the same location within the brain, and are commonly used in medical terminology and neuroanatomy textbooks. Understanding the different synonyms for this anatomical structure can help healthcare professionals more easily communicate with each other and their patients.