stapedius

noun
sta·​pe·​di·​us | \stə-ˈpē-dē-əs \
plural -dii\ -​dē-​ˌī \

Medical Definition of stapedius 

: a small muscle of the middle ear that arises from the wall of the tympanum, is inserted into the neck of the stapes by a tendon that sometimes contains a slender spine of bone, and serves to check and dampen vibration of the stapes

called also stapedius muscle

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