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hypergolic

[hahy-per-gaw-lik, -gol-ik]
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adjective
  1. (especially of rocket-fuel propellant constituents) igniting spontaneously upon contact with a complementary substance.
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Origin of hypergolic

First recorded in 1945–50; hyp(er)- + erg- + -ol2 + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hypergolic

hypergolic

adjective
  1. (of a rocket fuel) able to ignite spontaneously on contact with an oxidizer
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Word Origin

C20: from German Hypergol (perhaps from hyp (er-) + erg 1 + -ol ²) + -ic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hypergolic in Science

hypergolic

[hī′pər-gŏlĭk]
  1. Relating to or using a rocket propellant consisting of liquid fuel and an oxidizer that ignite spontaneously on contact.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.