white rainbow

noun

: a bow or arc of light formed by refraction and reflection from drops of water (as of a cloud of fog) too minute to give distinctly the concentric bands of color of the typical rainbow

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