Definition of hypergolic in English:

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Pronunciation: /ˌhʌɪpəˈɡɒlɪk/


(Of a rocket propellant) igniting spontaneously on mixing with another substance.
Example sentences
  • The Titan uses Aerojet-General LR87 and LR91 engines burning liquid hypergolic propellants that ignite spontaneously on contact.
  • Other onboard power sources serve as latent explosion triggers, including batteries, other pressurized systems, fuel cells and hypergolic fuels.
  • The testing of the hypergolic performance of the formulations can be achieved without gelling.


1940s: from German Hypergol, probably from hyper- 'beyond' + Greek ergon 'work' + -ol.

For editors and proofreaders

Line breaks: hy¦per|gol¦ic

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