additive A substance added to a propellant for any of a variety of reasons, including to stabilize or achieve a more even rate of combustion, to make ignition easier, to lower the freezing point of the propellant (to prevent it freezing in space), or to reduce corrosive effects. Related category PROPELLANTS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |