Despumate :: Despumate (v. t. & i.) To throw off impurities in spume; to work off in foam or scum; to foam.
Despumation :: Despumation (n.) The act of throwing up froth or scum; separation of the scum or impurities from liquids; scumming; clarification.
Despume :: Despume (v. t.) To free from spume or scum.