acantharian

noun

ac·​an·​thar·​i·​an

-rēən

plural -s

: a protozoan of the suborder Actipylea

Word History

Etymology

New Latin Acantharia + English -an

First Known Use

1888, 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