The shell of a tortoise, sometimes inaccurately the shell of a turtle, or that material.
A membranous resonator in a sound-producing organ in frogs and toads.
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.
A thin tense membrane covering the hearing organ on the leg or body of some insects, sometimes adapted (as in cicadas) for producing sound.
(in certain birds) The labyrinth at the bottom of the windpipe.
The eardrum (tympanic membrane, membrana tympanica).
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
The main portion of the middle ear: the tympanic cavity (cavitas tympani).