rockoon

rockoon

[rok-oon, ro-koon]
noun
a rocket launched from a balloon at a high altitude.

Origin:
1950–55; rock(et1) + (ball)oon

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World English Dictionary
rockoon (rɒˈkuːn)
 
n
a rocket carrying scientific equipment for studying the upper atmosphere, fired from a balloon at high altitude
 
[C20: from rocket1 + balloon]

Collins English Dictionary - Complete & Unabridged 10th Edition
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