01 n. The ear drum, or middle ear. Sometimes applied incorrectly to the tympanic membrane. See Ear.
pl.
Tympanums, Tympana ((#))
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1.
The ear drum, or middle ear. Sometimes applied incorrectly to the tympanic membrane. See Ear.(Anat.) See: Ear
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2.
One of the naked, inflatable air sacs on the neck of the prairie chicken and other species of grouse.(Zool.)
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3.
The recessed face of a pediment within the frame made by the upper and lower cornices, being usually a triangular space or table.(Arch.)
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4.
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.(Mech.)