What is the medical root word for brain?

The medical root word for brain is indeed "encephal/o." This root comes from the Greek word "encephalon," which refers specifically to the brain. It is commonly used in various medical terms, such as "encephalitis" (inflammation of the brain) and "encephalogram" (a record of brain activity).

The other choices represent different parts of the nervous system or related concepts. "Spinal/o" refers to the spine or spinal cord, "cerebell/o" pertains to the cerebellum, which is a part of the brain associated with coordination and balance, and "psych/o" relates to the mind or mental processes. Understanding these root words is essential for comprehending medical terminology and accurately communicating about different anatomical structures and functions within the body.