1. (

• middle_ear ,
• tympanic_cavity ,
• tympanum ,

) the main cavity of the ear; between the eardrum and the inner ear ;

2. (

• eardrum ,
• tympanum ,
• tympanic_membrane ,
• myringa

) the membrane in the ear that vibrates to sound ;

3. (

• kettle ,
• kettledrum ,
• tympanum ,
• tympani ,
• timpani

) a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it ;