aero·shell | \ ¦er-ō-¦shel \
plural aeroshells

Definition of aeroshell 

: heat shield One such system, the Viking-era 70° sphere cone aeroshell, has been used on every U.S. mission to the surface of Mars. —Donald Rapp, Human Missions to Mars, 2007

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First Known Use of aeroshell

1966, in the meaning defined above

History and Etymology for aeroshell

aero- + shell entry 1

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The first known use of aeroshell was in 1966

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