from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A barrier that prevents the heating of a space or an object by absorbing, reflecting, or dissipating external heat, especially a protective structure on a spacecraft or missile that dissipates heat on atmospheric reentry by melting and vaporizing.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A shield designed of a substance that absorbs excessive heat from an outside source by either dissipating, reflecting or simply absorbing the heat.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a protective covering that protects a spacecraft from overheating on reentry


Sorry, no etymologies found.


  • After the burn was complete, Hank maneuveredDiscovery into a nose-forward 40-degree upward tilt so that her belly heat shield was presented to the atmosphere.

    Riding Rockets

  • Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.

    Riding Rockets

  • Ren had said that would happenthe white part was made entirely of smart matter, a heat shield to protect it from burning up on the journey into orbit.



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