rockoon

noun

rock·​oon

(ˈ)rä¦kün

plural -s

: a small rocket carried to a high altitude by a balloon and then fired

Word History

Etymology

rock(et) + balloon

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now