What is a Pastel?
A Pastel is a drawing or painting done with a soft, chalk-like pastel "stick" composed of powdered pigments held together with an aqueous gum binder.
In appearance, the pastel stick essentially looks like a piece of chalk, although it is actually somewhat softer and smoother.
A drawing or painting created with this kind of stick is called a Pastel. An artist who works in the medium of pastels is called a "Pastellist".