Actinocrinus

noun

Ac·​ti·​no·​cri·​nus

ˌak-tə-(ˌ)nō-ˈkrī-nəs

: a genus (the type of the family Actinocrinidae) of crinoids abundant in the Mississippian rocks of America and Europe

Word History

Etymology

New Latin, from actin- + -crinus

First Known Use

1841, 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