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 scala tympan&imacron; : Latin scala, staircase (from its spiral structure ) + Latin tympan&imacron;, genitive of tympanum, drum (from its being separated from the tympanic cavity at one of its ends by a membrane ).