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Tympanum — The ear drum, or middle ear. Sometimes applied incorrectly to the tympanic membrane. See Ear.
Tympanum — A chamber in the anterior part of the syrinx of birds.
Tympanum — One of the naked, inflatable air sacs on the neck of the prairie chicken and other species of grouse.
Tympanum — The recessed face of a pediment within the frame made by the upper and lower cornices, being usually a triangular space or table.
Tympanum — The space within an arch, and above a lintel or a subordinate arch, spanning the opening below the arch.
Tympanum — 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.
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