HYPERGOLIC

[hy.per.gol.ic] adj [G Hypergol a hypergolic fuel, prob. fr. hyper- + erg- + -ol (hydrocarbon)] (1947) 1: igniting upon contact of components without external aid (as a spark)

2: of, relating to, or using hypergolic fuel -- hy.per.gol.i.cal.ly adv