a : something that is shaped by casting in a mildew or variety: including (one) : a reproduction (as of the statue) in metallic or plaster : casting (2) : a fossil copy of the details of a pure object by mineral infiltration b : an impact taken from an item with a liquid site or plastic material : mould They produced a mask from a wax cast of her facial area.

: a mass of plastic subject fashioned in cavities of diseased organs (as the kidneys) and discharged from your body

supporting cast Part of the film's results lies in the power on the supporting cast (= the actors who weren't playing the key sections).