tympanostapedial

tym·pa·no·sta·pe·di·al

(tim'pă-nō-stā-pē'dē-ăl),
Relating to the tympanic cavity and the stapes.

tympanostapedial

(tĭm″pă-nō-stă-pē′dē-ăl)
Pert. to the tympanic cavity and stapes.