Alcyonaria

plural noun

Al·​cy·​o·​nar·​ia

ˌal-sē-ə-ˈner-ē-ə

: a subclass or order of Anthozoa including chiefly compound coelenterates having polyps with 8-branched tentacles and eight septa and comprising the Stolonifera, Alcyonacea, Gorgonacea, and Pennatulacea

alcyonarian

ˌal-sē-ə-ˈner-ē-ən 

adjective or noun

Word History

Etymology

New Latin, from Alcyonium + -aria

First Known Use

1840, in the meaning defined above

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