Hydrachnoidea

Hy·​drach·​noi·​dea

ˌhīˌdrakˈnȯidēə

taxonomic synonym of hydrachnellae

Word History

Etymology

New Latin, from Hydrachna + -oidea

The Ultimate Dicitonary 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