It is a "ferrule."
It is called umbrella suicide. It is simply because they couldn't take the pressure....
The top part of a shoe is called the upper
a umbrella can be a simple machine but it depends on how it's made
This is called wavelength.
The crest.
The top of the umbrella crab is called the carapace.
the top part is called the spine and the spike like things are called teeth
what is the pole of the umbrella called
The tip of an umbrella is the spike that was originally on all umbrellas but not parasols. The spike is centred on the outside of the umbrella at the point where all the 'ribs' meet. The purpose was so that when the umbrella was placed in an upright position to dry, IE when the 'tip' was on the floor, the water would not accumulate in the material but run down the 'tip', drying the whole umbrella.
finial thedevilsspike
i have a dog called spike!!
That is just the name they came up with. There is no specific reason. It comes from a Latin word 'Umbra' and its meaning is shade or shaded
Ferrule
There is an Umbrella Plant - Schefflera arboricola
because spike lee is a known pot smoker
The top part, the bell.
The ozone layer is called life protecting umbrella because it acts as an umbrella. It protects us from the fatal UV radiations.