Definition of Testacea
:an order of Rhizopoda containing forms (as of the genera Arcella and Difflugia) with an external test
—
What's Trending Now
More Trending Words
Testacea
plural noun
Tes·ta·cea
\
teˈstāsh(ē)ə
\
From the M-W Editors
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of testacea
New Latin, from Latin, neuter plural of testaceus covered with a shell
Seen and Heard
What made you want to look up Testacea? Please tell us where you read or heard it (including the quote, if possible).
