What is "tanycyte"

n. A type of ependymal cell, located in the floor of the third ventricle, that have processes extending deep into the hypothalamus

Tanycytes are special ependymal cells found in the third ventricle of the brain, and on the floor of the fourth ventricle and have processes extending deep into the hypothalamus. It is possible that their function is to transfer chemical signals from the cerebrospinal fluid (CSF) to the central nervous system (CNS). The term tanycyte comes from the Greek word tanus which means elongated.