0 a small hollow place, especially one that appears on a person's face when they smile -- （尤指人面部的）酒窩；淺凹
The outer leaflets fuse and the distal leaflets are pulled towards each other, forming a dimple.
This marks the initiation of the formation of the dimple and the trapping of fluid underneath it.
If you look very closely, next to the dimple, a number - 4283 - can be made out, stamped (not moulded) into the white plastic.
However, in these earlier studies, the dimple is assumed already formed and is described in a more or less ad hoc manner.
This lower profile is capillary-like, having two large and three small dimples.
At the same time, a small filament of drop fluid develops right above the dimple.
This confirms that the dimple has a parabolic shape to a first approximation.
Beyond the dimple, the thickness quickly returns to the asymptotic form given by (30).
