tympanum
英 ['tɪmpənəm]
美['tɪmpənəm]
- n. [无脊椎] 鼓室；[解剖][无脊椎] 鼓膜，耳膜；振动膜
英英释意
- 1. the main cavity of the ear; between the eardrum and the inner ear
- 2. the membrane in the ear that vibrates to sound
- 3. a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it