| hyperegol | a. (Rocketry) A substance which can form one of a pair of hypergolic substances. See hypergolic. [ PJC ] |
| hyperegolic | a. (Rocketry) Igniting spontaneously when mixed together; -- used of pairs of substances which react violently with evolution of heat when mixed, as for example hydrazine and nitrogen tetroxide. Such combinations of substances are convenient for use in liquid-fueled rockets, as they do not require a source of ignition. [ PJC ] |