ductus endolymphaticus
noun
ductus en·do·lym·phat·i·cus
| \ -ˌen-dō-lim-ˈfat-i-kəs
\
\
Medical Definition of ductus endolymphaticus
: a tubular process of the membranous labyrinth of the ear that ends blindly but has its base in communication with both the utricle and the saccule