hypergolic

Etymology
From +  +  +, after the model of  and. Equivalent to +.

Adjective

 * 1)  Igniting spontaneously upon contact with an oxidizer.
 * 2) * 2016, Pasquale M. Sforza, Theory of Aerospace Propulsion, 2nd ed.,, page 565:
 * Although the LF$2$-LH$2$ cryogenic combination is hypergolic, the toxicity of the fuel and the products of combustion have made the use of this system impractical. In general, the commonly used hypergolic propellants are considered conventionally storable, that is, they do not need special refrigeration equipment to keep them liquid.
 * 1)  Involving such a hypergolic agent.

Translations

 * German: hypergolisch
 * Italian: ipergolico

Noun

 * 1) A hypergolic propellant; a hypergol.