ROCKETRY TERMINOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site fuel Any substance used to produce heat, either by chemical or nuclear reaction. In the case of a liquid-propellant rocket engine, fuel is ordinarily distinguished from oxidizer where these are separate. Related entry    • propellant Related category    • ROCKETRY TERMINOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP