If a Component of your body is within a cast, it's a plaster cast all-around it to guard it even though a broken bone repairs itself:
: a mass of plastic make a difference shaped in cavities of diseased organs (as being the kidneys) and discharged from the human body
a : an overspread of a coloration or modification of the appearance of the substance by a trace of some extra hue : shade gray that has a greenish this website cast