Pygidiidae

noun

Py·​gi·​di·​idae

ˌpījəˈdīəˌdē

in some classifications

: a family of usually small and often parasitic South American catfishes that lack an adipose fin and have the dorsal fin located far back toward the tail

Word History

Etymology

New Latin, from Pygidium, type genus (from Greek pygidion) + -idae

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