black guillemot

noun

: a small red-footed guillemot (Cepphus grylle) that is black with white wing patches in summer and largely mottled with white in winter

called also white guillemot

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