Cheilostomata

plural noun

Chei·​lo·​sto·​ma·​ta

ˌkīləˈstōmətə

: a large order of marine bryozoans (class Gymnolaemata) having the colony erect or encrusting, the zooecia more or less tubular, and the aperture closed by a chitinous operculum when the polypide is retracted

Word History

Etymology

borrowed from New Latin, plural of Cheilostoma, from cheilo- cheilo- + -stoma -stoma entry 1

First Known Use

1852, in the meaning defined above

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