| 单词 | tympanum |
| 释义 | tympanum n. (pl. tympanums or tympana) 1. Anat. a the middle ear. b the tympanic membrane. 2. Zool. the membrane covering the hearing organ on the leg of an insect. 3. Archit. a a vertical triangular space forming the centre of a pediment. b a similar space over a door between the lintel and the arch; a carving on this space. 4. a drum-wheel etc. for raising water from a stream. Etymology: L f. Gk tumpanon drum f. tupto strike |
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