a : something that is fashioned by casting inside a mildew or form: for example (one) : a reproduction (as of the statue) in metallic or plaster : casting (2) : a fossil copy of the main points of a pure item by mineral infiltration b : an impact taken from an item with a liquid or plastic material : mould They created a mask from a wax cast of her confront.

: a mass of plastic matter fashioned in cavities website of diseased organs (given that the kidneys) and discharged from your body

discard implies the allowing go or throwing absent of something that is becoming worthless or superfluous although generally not intrinsically valueless.