A chamber in the anterior part of the syrinx of birds.

One of the naked, inflatable air sacs on the neck of the
prairie chicken and other species of grouse.

The recessed face of a pediment within the frame made by
the upper and lower cornices, being usually a triangular space or
table.

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

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.