auditory vesicle noun Embryology.
- the pouch that is formed by the invagination of an ectodermal placode and that develops into the internal ear.
Also called otic vesicle,. auditory vesicle in Medicine auditory vesicle n.
- Either of the paired sacs of invaginated ectoderm in the embryo that develop into the membranous labyrinth of the internal ear.otic vesicle