tympanum

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

   The eardrum (tympanic membrane, membrana tympanica).

2. The main portion of the middle ear: the tympanic cavity (cavitas tympani).

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

3. A thin tense membrane covering the hearing organ on the leg or body of some insects, sometimes adapted (as in cicadas) for producing sound.

   Tympanum

4. A membranous resonator in a sound-producing organ in frogs and toads.

5. (in certain birds) The labyrinth at the bottom of the windpipe.

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

   Tympanum

   тимпанtimpan

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

   The recessed triangular space within an arch, and above a lintel or a subordinate arch, spanning the opening below the arch.

8. 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.

9. (archaic)A drum.

regular