What do you call the thing you get at the hospital when you break your leg, etc.?

When you break your leg or any of your appendages you get a binding, you know, the white thing to fix your arm or leg. What is that called?

I find the words gypsum, cast and plastery in the dictionary but from searching pictures on Google these don't seem to be the right words. (Also, in what context do you use these?)

I want to find a picture on Google where a group of people got these bindings on their legs, arms, necks, etc. What is the right word?

Solution 1:

Generally, that "white thing" is called a cast (see definition 6c).

A rigid casing (as of fiberglass or of gauze impregnated with plaster of paris) used for immobilizing a usually diseased or broken part.

Like this:

Solution 2:

It's a cast, often made of plaster or fiberglass.