black-capped petrel

noun

: a heavy-bodied petrel (Pterodroma hasitata) with a dark crown and whitish nape, neck, forehead, and tail coverts that is now rare and that has unknown breeding grounds

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