'Endolymph' definitions:

Definition of 'endolymph'

(from WordNet)
noun
The bodily fluid that fills the membranous labyrinth of the inner ear

Definition of 'Endolymph'

From: GCIDE
  • Endolymph \En"do*lymph\, n. [Endo- + lymph: cf. F. endolymphe.] (Anat.) The watery fluid contained in the membranous labyrinth of the internal ear. [1913 Webster]