gas·​tro·​trich ˈga-strə-ˌtrik How to pronounce gastrotrich (audio)
: any of a phylum (Gastrotricha) of minute aquatic pseudocoelomate animals that usually have a spiny or scaly cuticle and cilia on the ventral surface

Word History


ultimately from Greek gastr- + trich-, thrix hair — more at trich-

First Known Use

1940, in the meaning defined above

Time Traveler
The first known use of gastrotrich was in 1940

Dictionary Entries Near gastrotrich

Cite this Entry

“Gastrotrich.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2024.

Kids Definition


gas·​tro·​trich ˈgas-trə-ˌtrik How to pronounce gastrotrich (audio)
: any of a small group of tiny animals that live in water and move by gliding

More from Merriam-Webster on gastrotrich

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!