0 a device that measures time in hours by passing sand from one glass container through a narrow tube into a lower container. -- timeglass
The sands are running out in the hourglass so far as they are concerned.
Compound eyes in untreated specimens are reddish and somewhat hourglass-shaped, concave on the anterior and posterior edges, not divided.
Non-image incensario forms are primarily open bowls (lak?) or basins and pedestal or hourglass (biconical) vase shapes.
During growth there is also a change from an 'hourglass-shaped' glabella to a nearly parallel-sided glabella, tapering slightly forward.
The timepiece in question seems to have relied upon the movement of a fluid, something like sand in an hourglass.
The hourglass visualises this fragmentation of time through the falling of sand grains.
The transverse view clearly shows an hourglass shape to the imploded target.
The transverse views demonstrate an hourglass-shape to the imploded target.