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heat shield
noun
: a barrier of ablative material to protect a space capsule from heat on its entry into an atmosphere
Examples of heat shield in a Sentence
Recent Examples on the Web
Other changes on Flight 7 included a new tapered edge to the line where the tiles meet the ship's stainless steel skin and multiple metallic tile options, including one with active cooling, to test alternative heat shield materials.
—Ars Technica, 17 Jan. 2025
Orion’s heat shield covers the bottom of the capsule and plays a crucial role in protecting the spacecraft — and potential astronauts onboard — from the extreme temperatures of re-entering the Earth’s atmosphere.
—Denise Chow, NBC News, 5 Dec. 2024
The probe is outfitted with a heat shield that can withstand temperatures up to 2,500 degrees Fahrenheit, the AP reported.
—Stephen Smith, CBS News, 3 Jan. 2025
The Parker Solar Probe's spacecraft components and science instruments are protected by heat shield that is 8 feet wide (2.4 meters) and 4.5 inches (11 centimeters) thick.
—Tariq Malik, Space.com, 22 Dec. 2024
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Word History
First Known Use
1962, in the meaning defined above
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Cite this Entry
“Heat shield.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20shield. Accessed 29 Jan. 2025.
Kids Definition
heat shield
noun
: a barrier of insulation to protect a space capsule from heat on its return to earth
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