What does "rockoon" mean?

A rocket, powered by solid fuel, that is not lit while on the ground but first carried into the upper atmosphere by a gas-filled balloon, then separated from the balloon and automatically ignited to allow it to achieve a higher altitude.

What is a synonym for "rockoon"?

Common synonyms include: missile, rocket.

Rockoon

//ɹɒˈkuːn// noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A rocket, powered by solid fuel, that is not lit while on the ground but first carried into the upper atmosphere by a gas-filled balloon, then separated from the balloon and automatically ignited to allow it to achieve a higher altitude.

Synonyms

All synonyms

missile rocket

Etymology

Blend of rocket + balloon.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.