So far as I know, the Hook But the real name, I cant find anywhere.
An indentation of the shoreline is a cove or bay.
Phillips head screwdrivers only work on Phillips head screws--which are ones with an "x" indentation on the head of the screw. A straight screwdriver works on screws with a single line indentation on the head of the screw.
An indentation on the top of the head is most likely due to an injury. However, the only individual that can answer this would be a physician.
Moving the head back is called extension of the head
That could be anything. You could have hit your head on the ground while jumping, you could have been dropped on your head as a baby (most likely), or you could have some disease that makes your skull have an indentation.
Lumen
It's not a growth. The orange lumps are pollen stored in what's called a pollen basket. A pollen basket is an indentation in a bee's back legs
The indentation at the top of the manubrium is called the jugular notch.
This indentation is called the oral groove which leads to the gullet. See the link below for a diagram:
It's called an Indent, or Indentation.
A shoreline indentation is called a bay. It is a curved area of water partially surrounded by land, often less exposed to the open sea than a gulf.
occipital