tympanums

各种动物中与鼓面类似的解剖结构

Any of various anatomic structures in various animals with analogy to a drum head:

三角楣饰两侧之间垂直内凹的三角空间,通常有装饰

A vertical recessed triangular space between the sides of a pediment, typically decorated.

鼓形水轮,内有螺旋隔板,下部浸水旋转时将水提升至轴心,用于提水灌溉

A drum-shaped wheel with spirally curved partitions by which water is raised to the axis when the wheel revolves with the lower part of the circumference submerged; used for raising water, as for irrigation.