scala tympaniscala tym·pa·ni
nounpl. scalae tym·pa·no·rum,
The lowermost of the three divisions of the spiral cavity winding around the modiolus of the cochlea in the inner ear. It is filled with perilymph and transmits sound vibrations from the scala vestibuli, with which it is contiguous at the apex of the cochlea.
Origin of scala tympaniNew Latin scāla tympanī Latin scāla staircase ( from its spiral structure )Latin tympanī genitive of tympanum drum ( from its being separated from the tympanic cavity at one of its ends by a membrane )