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rockoon

[rok-oon, ro-koon] /ˈrɒk un, rɒˈkun/
noun
1.
a rocket launched from a balloon at a high altitude.
Origin
1950-1955
1950-55; rock(et1) + (ball)oon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rockoon

rockoon

/rɒˈkuːn/
noun
1.
a rocket carrying scientific equipment for studying the upper atmosphere, fired from a balloon at high altitude
Word Origin
C20: from rocket1 + balloon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Value for rockoon

13
15
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