Home › Words › S › subependymomasubependymomasubependymoma means A rare form of ependymal tumor. They are classically found within the fourth ventricle, typically have a well demarcated interface to normal tissue and (unlike ependymomas) do not usually extend into the brain parenchyma.Among words judged in Lexicurio's Arena, subependymoma ranks #42,458 of 42,747 for Qualifying.EtymologyFrom sub- + ependymoma.nounA rare form of ependymal tumor. They are classically found within the fourth ventricle, typically have a well demarcated interface to normal tissue and (unlike ependymomas) do not usually extend into the brain parenchyma.Definitions & examples from Wiktionary (CC BY-SA 3.0).