adj. 1. Of or relating to a rocket propellant consisting of fuel and an oxidizer that ignite spontaneously on contact. 2. Using such a fuel. [From German Hypergol, a hypergolic fluid propellant : from hyper-, extreme (from Greek huper-; see HYPER-) + Greek ergon, work; see ERG1.] hyper·gol′ (hīpər-gôl′, -gōl′, -gŏl′) n. hy′per·goli·cal·ly adv. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.