PLASTER

(SUBSTANCE) [noun] [U] - a substance which becomes hard as it dries and is used esp. for spreading on walls and ceilings in order to give a smooth surfaceThe plaster on the walls had cracked as it dried.A roof leak has damaged a section of ceiling plaster.The wall paintings were frescoes, painted in the traditional way on wet plaster.See also plasterboard.Plaster of Paris is a mixture of a white powder and water which becomes hard quickly as it dries and is used esp. to make plaster casts.A plaster cast (also cast) is a shape made of plaster of Paris, either a protective covering for a broken bone or a copy of another object such as a statue.(UK) If a part of the body is in plaster (US and ANZ also in a cast), it has a plaster cast around it to protect it while it heals.When I broke my leg, I had it in plaster for about six weeks.See picture: Medical equipment