perilymph

The fluid in the space between the membranous and bony labyrinths of the inner ear.

The clear fluid contained within the osseous labyrinth of the ear, surrounding the membranous labyrinth: distinguished from endolymph. Also called liquor Cotunnii.

The fluid which surrounds the membranous labyrinth of the internal ear, and separates it from the walls of the chambers in which the labyrinth lies.

An extracellular fluid found in the scala tympani and scala vestibuli of the cochlea.

the bodily fluid that fills the space between the bony labyrinth and the membranous labyrinth of the inner ear